IELTS Writing Task 1 line graph: how to describe trends clearly
A step-by-step method for IELTS Academic Writing Task 1 line graphs: overview, grouping trends, accurate data, and trend vocabulary.
By English Grader study guides · AI-assisted educational content · Official sources linked below
The short answer
Write a clear overview of the main trends first, then group lines that behave similarly and support each claim with selected figures.
Start with an overview, not every number
Task 1 asks you to summarise the main features. For a line graph, that usually means the overall direction of each line and the biggest change or crossover. An overview sentence without numbers is often the clearest way to show this.
Many essays list figures year by year. That shows reading ability, but not the selection and comparison the task asks for.
Overview example
Overall, car use rose steadily throughout the period, while bus travel declined, and by 2020 cars had become the most common form of transport.
Related guide: How to describe any IELTS chart
Group the lines into two body paragraphs
Put lines with similar trends together, or split the period at a turning point. Two body paragraphs are usually enough for a clear structure.
- Paragraph 1: rising lines, with start and end figures.
- Paragraph 2: falling or fluctuating lines, with the peak or lowest point.
- Compare where useful: 'twice as high as', 'overtook'.
Trend vocabulary that stays accurate
Use a mix of verb and noun structures, but choose words that match the data. 'Soared' for a small rise is inaccurate, not impressive.
- rose gradually / a gradual rise
- fell sharply / a sharp fall
- levelled off at / remained stable
- peaked at / reached a high of
Related guide: Paraphrase the question without copying it
Check your report after writing
Check that you have an overview, that every figure is correct, and that you haven't added opinions or reasons not shown in the graph. English Grader does not currently grade Task 1 reports.
Review IELTS vocabulary →Put this into practice
Use vocabulary study for broader IELTS preparation; the Writing feedback tool currently focuses on Task 2.
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Official sources and further reading
Practice examples and study routines are illustrative advice, not official band-scored answers or predictions of exam questions.