Cambridge IELTS 21 Academic — Test 1 Writing Task 1: Full Analysis

The danger in this task is not a shortage of things to describe. Four sectors, four dates and several changes of direction provide more than enough detail. The difficulty is deciding which relationships make the graph intelligible—and expressing those relationships without turning the report into sixteen disconnected figures.

Cambridge IELTS 21 Academic, Test 1 presents a line graph of job numbers in four US economic sectors from 1960 to 2020. The sectors are manufacturing, retail, agriculture and healthcare; the vertical scale measures millions of jobs. Keep the original graph in your own copy beside this analysis. It is not reproduced here.¹

The figures below are readings of the task's plotted values, so approximate language is appropriate. They are not being offered as independently verified historical employment statistics. The model report and all alternative sentences are original teaching examples, not Cambridge sample answers.

Understanding the task

Your job is to summarise the main features and make relevant comparisons. In the official Academic Writing format, Task 1 requires at least 150 words, with roughly 20 minutes recommended within the 60-minute Writing test. Task 2 has greater weight, so spending too long polishing this report has a cost elsewhere.²

Identify the unit before planning. These are numbers of jobs, not percentages, salaries, output or the number of companies. A sector can have more jobs than another without the graph telling us its share of the entire US economy. Avoid introducing a denominator the visual does not provide.

Identify the time frame next. All four observations belong to completed years, so the main descriptions normally use past forms. The graph is a line graph, even though it has only four labelled observations per series. Do not call it a bar chart or treat its lines as four categories observed only once.

Finally, distinguish description from explanation. The graph shows changes in employment; it does not establish their causes. Automation, population ageing, trade or changes in consumer demand might be relevant to a real economic investigation, but the visual does not supply that investigation. Adding such explanations would move beyond this task.

What information matters most

The change in which sectors lead

Manufacturing begins with the largest total and remains ahead at the first three plotted dates. By the final date, retail and healthcare have reached approximately the same level and both exceed manufacturing. That change in ranking is one of the most useful comparisons in the graph.

Do not identify manufacturing and retail as the two largest sectors at the end merely because manufacturing dominates much of the earlier period. The final comparison must be made at the 2020 points. A correct beginning can otherwise lead to an incorrect overview.

Different routes to growth and decline

Retail rises throughout the period, although its final increase is much smaller than the preceding increases. Healthcare also rises and records the greatest overall absolute gain, moving from the lowest starting figure to a joint lead at the end. Their final similarity is especially meaningful because their starting positions differ.

Manufacturing does not fall throughout the entire period. It first rises from about 15 million to a peak of 20 million, then declines to around 13 million. Agriculture falls overall, but the plotted figure stays at approximately 3 million between 1980 and 2000 before falling again. A flat interval prevents continuously declining from being an accurate description of that series.

Extremes and magnitude

Manufacturing's 1980 value is the highest plotted point. Healthcare starts at roughly 2 million, while agriculture finishes at about that level. Those similar values occur in different sectors and years, so they should not be combined into a claim that either sector remains unchanged over the whole period.

The overall direction and the size of a change are different features. Retail gains roughly 10 million jobs; healthcare gains around 14 million. You do not need both calculations in the report, but making them while planning helps identify which change deserves emphasis. Select a figure because it demonstrates a relationship, not because you have not yet mentioned it.

How to write the overview

An overview should compress the graph's organising pattern. Here it should normally capture the rise of retail and healthcare, manufacturing's initial increase followed by decline, and agriculture's overall fall. The change in the leading sectors gives those trends a useful comparative frame.

It should not claim that every series moves continuously in one direction or that manufacturing remains the leader at the end. Nor should it merely announce that there were changes. The reader should learn something substantial about the graph before reaching the detailed paragraphs.

Overview option 1 — Trends and final ranking

“Overall, retail and healthcare employment increased, and these sectors had the highest figures by 2020. Manufacturing rose initially before declining, while agriculture lost jobs overall and ended with the lowest total.”

This is the overview used in the model. It gives all four sectors a place without listing their individual figures. The word initially protects the manufacturing description from oversimplification, and overall allows for agriculture's flat interval.

Overview option 2 — The changing lead

“Manufacturing led at the earlier observations but was overtaken by retail and healthcare by the end of the period. Both of the latter sectors expanded overall, whereas agriculture contracted; manufacturing also finished below its starting level despite an early peak.”

This version begins with rank and then qualifies the directions of change. It is denser, so use it only if you can keep the references clear. The latter sectors means retail and healthcare, not whichever two nouns happen to be nearest in a different draft.

Overview option 3 — The largest transformation

“The most striking change was the expansion of healthcare from the smallest sector shown to a joint lead with retail. In contrast, agriculture declined overall, while manufacturing's early growth was followed by a sustained fall.”

This version prioritises healthcare and then situates the remaining patterns. Its strength is selection; its risk is letting the later detail neglect retail's trajectory. An overview and its supporting paragraphs must work together.

There is no need to force all three formulations into one report. An overview is not better because it contains more sentences. Choose a concise account that is accurate and then show the evidence in the body.

Best paragraph structure

A practical four-paragraph plan is: introduce the visual and its scope; give the overview; describe manufacturing and agriculture; then compare retail and healthcare. This grouping keeps the two overall declining series together and the two expanding series together, while preserving the different paths within each pair.

The third paragraph must acknowledge manufacturing's early increase. Grouping is not permission to pretend that the lines are identical. Likewise, the fourth paragraph should show that retail starts above healthcare but ends at roughly the same level. A good grouping creates opportunities for comparison instead of concealing differences.

A chronological structure can also work, but moving through every sector at each of the four dates often becomes mechanical. Four separate sector paragraphs may make comparisons harder to see. Neither format is forbidden; this particular graph simply lends itself well to the two-pair structure.

Within each detailed paragraph, move from starting point to important intermediate change and then to endpoint. Mention every intermediate value only if it helps explain the pattern. The model omits healthcare's 1980 figure because its start, later scale and final equality with retail already communicate the chosen comparison.

Vocabulary for this graph

Use the number of jobs, employment in a sector and the figure for a sector to vary reference without changing the measurement. Employees is not an exact substitute for jobs in every context, because the units need not represent unique individuals. Preserve the task's unit.

Useful movement patterns include rose to, fell from, peaked at, remained at and finished at. “Manufacturing peaked at approximately 20 million jobs” reports a high point. “Manufacturing reached at 20 million” mixes the patterns reach a figure and rise to a figure.

Distinguish level from change. Manufacturing ended at about 13 million after falling by roughly 7 million from its peak. It did not fall by 13 million. The phrase a decline of 7 million gives the change; a decline to 13 million gives the resulting level.

For comparison, exceeded, was higher than, matched and reached a similar level are more useful than searching for dramatic verbs. “Healthcare matched retail by 2020” captures a relationship. “Healthcare was dramatic” does not describe a numerical pattern.

Choose intensity carefully. Retail's final increase is small compared with its earlier rises, so describing the whole line as soaring obscures a useful distinction. Rose substantially over the period can be defensible, but the body should still acknowledge the slowing growth. Strong wording must follow the data rather than replace it.

Grammar that serves the information

Past simple forms carry the timeline: rose, fell, increased, declined, remained and reached. The introductory reporting verb can be present: “The graph compares…” describes the visual now in front of the reader. That is not inconsistent with past-tense data descriptions.

Comparative clauses are useful: “Retail continued to grow, whereas manufacturing declined after 1980.” The contrast has a clear basis. A while-clause could do the same work, but make sure while cannot be misread as referring only to simultaneous actions when your intended comparison is broader.

Reduced clauses can connect stages economically: “Manufacturing peaked in 1980 before falling to around 13 million.” The understood subject of falling is still manufacturing employment. Avoid a construction in which an unattached -ing phrase appears to describe the wrong sector.

Agreement depends on the grammatical subject. “The number of jobs was higher”, but “Job numbers were higher”. “There were 16 million jobs” is natural; “there was 16 million jobs” loses agreement. Million remains singular after a specific number: 16 million jobs, not 16 millions jobs.

There is no reason to force a passive into an ordinary trend. Jobs fell is different from jobs were cut, which implies an action not established by the line. The graph gives changes in totals, not necessarily the decisions or mechanisms that produced them.

Common mistakes in this task

Missing the overview is a structural problem, but a misleading overview can be just as damaging. Check the final ranking and the direction of each series before deciding that the paragraph is finished. The purpose is to orient the reader accurately.

Avoid listing every figure with the same sentence pattern. “In 1960 there were…” repeated for all four sectors, followed by the same routine for 1980, makes the reader perform the comparisons. Use the paragraphs to interpret the visible relationships within the limits of the task.

Do not call the totals percentages or shares of all American employment. Do not assign an exact crossing year between labelled observations unless the task clearly supplies it. The lines show that a change in relative position occurs; they do not justify pretending that the graph labels the precise month or year of that crossover.

Do not describe agriculture as falling in every interval. Do not describe manufacturing as declining from 1960 onwards. Do not treat healthcare's initially small figure as evidence that its final figure is small. These are failures to read the whole trajectory, not vocabulary problems.

Finally, remove explanations of causes, personal opinions and unsupported predictions. A concluding recommendation about protecting jobs belongs to a different kind of writing. This report needs a clear account of the supplied visual.

Original high-band model answer

This response aims to demonstrate the control associated with strong performance. It is a teaching model, not an official examiner-awarded Band 8 or Band 9 script. Its quality depends on accurate selection and communication, not on a score label.³

The line graph compares the number of jobs in manufacturing, retail, agriculture and healthcare in the United States at four points between 1960 and 2020, with figures given in millions.

Overall, retail and healthcare employment increased, and these sectors had the highest figures by 2020. Manufacturing rose initially before declining, while agriculture lost jobs overall and ended with the lowest total.

Manufacturing began at approximately 15 million jobs and peaked at 20 million in 1980. Its figure then fell to around 17 million in 2000 and 13 million in 2020. Agriculture, by contrast, started at about 6 million, dropped to 3 million by 1980 and remained at this level in 2000, before declining further to roughly 2 million.

Retail and healthcare followed upward paths. Retail employment increased from around 6 million to 10 million between 1960 and 1980, then reached 15 million in 2000. Its subsequent rise was much smaller, bringing the figure to approximately 16 million in 2020. Healthcare started with only about 2 million jobs, the lowest initial figure, but grew to roughly 11 million by 2000 and finished at around 16 million, matching retail and exceeding manufacturing.

Why the model works, paragraph by paragraph

Paragraph 1 — A precise frame

The introduction identifies the visual, the four sectors, the country, the period and the unit. It does not waste space announcing an intention to describe the graph. At four points avoids suggesting continuous annual observations, while in millions establishes how the reader should interpret the values that follow.

Paragraph 2 — An overview with qualifications

The overview selects the broad trends and the final leaders. Initially and overall are small but important qualifications: they preserve manufacturing's peak and agriculture's interruption in decline. The paragraph states relationships without repeating all the detailed figures.

Paragraph 3 — Two declines, different paths

Manufacturing receives enough detail to establish its peak and subsequent fall. Agriculture's plateau is explicitly included. By placing the series together, the paragraph allows comparison while avoiding the false claim that both decreased in the same way throughout.

Paragraph 4 — Growth and convergence

Retail's slowing final increase is contrasted with healthcare's much larger overall rise. The paragraph ends with the clearest final comparison: both reach about 16 million and stand above manufacturing. Healthcare's intermediate detail is selected, so the paragraph remains a report of features rather than a complete verbal data table.

Reading the model through the assessment criteria

Task Achievement rests on reporting the right patterns, comparisons and supporting values. The model's overview is supported by the two detail paragraphs, and no cause is invented. Coherence and Cohesion come from meaningful grouping and clear reference rather than a linking expression at the start of every sentence.

Lexical Resource is shown through controlled movement and comparison language: peak, subsequent rise, matching and exceeding each have a precise job. Grammatical Range and Accuracy are visible in the mixture of direct statements, contrasts and clauses linking stages. Sentence length varies with the information. These are applications of the official criteria to this response, not a claim that using a particular phrase earns a particular band.³

Useful alternative sentences

“After reaching 20 million in 1980, manufacturing employment declined at both subsequent observations.” This replaces several separate statements with an accurate sequence, but still needs an endpoint elsewhere in the paragraph.

“Agriculture remained at approximately 3 million jobs between 1980 and 2000 before falling again.” This makes the flat interval explicit and is more precise than saying the decline was continuous.

“By 2020, healthcare and retail each provided around 16 million jobs, compared with roughly 13 million in manufacturing.” Each clarifies that 16 million belongs to both sectors separately, not to their combined total.

“Although healthcare began below all three other sectors, it had caught up with retail by the final year.” The concession highlights the scale of the change without inventing a cause. Caught up with describes reaching the same level, not surpassing it.

Choose alternatives only when they fit the surrounding report. A collection of individually strong sentences can still become repetitive if each restates the same final comparison.

How to practise this task again

Before rewriting, make a small planning note: unit, period, initial leader, final leaders, peak, lowest endpoint and the exception to each broad trend. Then write the overview without looking at your first attempt. Check its truth against every series.

Draft the two detail paragraphs from the relationships you selected. After writing, trace each numerical claim back to a point or a clear comparison in the graph. Check from, to and by, the singular or plural subject, and whether the sentence implies a cause. Remove detail that contributes no new comparison or evidence.

The standard to aim for is a reader who can reconstruct the main shape of the graph from your report without having to sort a list of numbers. That is the purpose of selection.

For a fuller reference, see comparison and change language in the vocabulary guide and comparatives in the grammar guide.