IELTS Writing Task 1 Line Graph: Structure, Language and Model Answer

In this guide

1. 1What the IELTS Writing Task 1 Line Graph Task Is
2. 2A Sample IELTS Writing Task 1 Line Graph Question
3. 3How to Plan and Structure Your Answer
4. 4Useful Language for an IELTS Writing Task 1 Line Graph
5. 5IELTS Line Graph Model Answer
6. 6Why the Model Answer Works
7. 7Common Mistakes That Lower the Band
8. 8How to Practise and Key Takeaways

An IELTS Writing Task 1 line graph is a common visual in the Academic module. It shows how one or more categories change over time. Your job is not to explain why the changes happened, but to describe the main trends clearly and accurately. This guide explains what the task involves, how to plan your report, which language to use and what a high-scoring answer looks like. You will also find a full IELTS line graph model answer and practical advice on avoiding common mistakes.

What the IELTS Writing Task 1 Line Graph Task Is

The IELTS Writing test lasts 60 minutes and has two tasks. Task 1 in the Academic module asks you to write a factual report of at least 150 words. You should spend about 20 minutes on it. Task 2 is an essay of at least 250 words and should take about 40 minutes. Task 2 counts twice as much as Task 1, so you must manage your time carefully. Writing fewer than 150 words in Task 1 will lose marks.

An Academic Task 1 visual can be a line graph, bar chart, pie chart, table, a combination of graphs, a process diagram or maps. A line graph specifically shows change over time. The horizontal axis usually shows years, months or days, and the vertical axis shows quantities such as numbers, percentages or units. One or more lines represent different categories.

The examiner expects a factual report. You should not give opinions or suggest reasons that are not shown in the graph. The most important feature is an overview of the main trends. Without a clear overview, your Task Achievement band is limited. You also need to select key figures rather than describe every point on the line.

If you are unsure how this task fits into the wider test, see all IELTS Writing task types: Academic Task 1 visuals, General Training letters and Task 2 essays, with how to approach each.

A Sample IELTS Writing Task 1 Line Graph Question

The task below is typical of the question type. Imagine the graph shows the number of visitors to three museums in a city between 2000 and 2020.

You should spend about 20 minutes on this task.

The line graph below shows the number of visitors to three museums in one city from 2000 to 2020.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Write at least 150 words.

The graph shows that Museum A rose steadily, Museum B increased slightly before falling, and Museum C grew slowly at first and then sharply. The lines for Museum A and Museum C cross between 2015 and 2020.

How to Plan and Structure Your Answer

Use the first few minutes to study the graph. Identify the time period, the units and the number of lines. Look for the overall trend of each line and any important crossing points. Decide which lines have similar patterns so you can group them in your report.

A clear paragraph structure helps Coherence and Cohesion. The table below shows a reliable plan.

Do not describe every year. Select the start point, the end point, any peak and any lowest point. If a line fluctuates, say so, but do not list every small movement. The overview should come after the introduction or at the end, but it must be present and clearly identifiable.

Useful Language for an IELTS Writing Task 1 Line Graph

Using accurate line graph vocabulary IELTS is essential for a high Lexical Resource score. The language should describe movement, speed and degree of change. Avoid memorised phrases that do not match the data.

Verbs and adverbs for change

Nouns for change

You can also use noun phrases: a sharp rise, a steady increase, a gradual decline, a significant drop, a period of fluctuation.

Useful phrases for peaks and lows

• peaked at
• reached a peak of
• reached a low of
• hit its lowest point at

Tenses

The tense follows the time period. If the graph shows past years, use the past simple. If it shows future predictions, use phrases such as “is expected to rise” or “is projected to fall”. Do not mix tenses unless the graph includes both past and future data.

Comparison language

• compared with
• whereas
• while
• in contrast
• the highest number of visitors
• the lowest figure

For more on how to describe a line graph, practise using these structures with different data sets. The key is to match the language to the exact movement shown.

IELTS Line Graph Model Answer

The model answer below describes the sample question. It is factual, selects key figures and includes a clear overview.

The line graph illustrates how many people visited three museums in one city over a period of twenty years, from 2000 to 2020. The figures are given in thousands.

Overall, Museum A had the highest number of visitors throughout most of the period and rose steadily. Museum C showed the most dramatic change, increasing sharply and overtaking Museum B, while Museum B declined after an initial rise.

Museum A started at 120,000 visitors in 2000 and climbed consistently to 200,000 by 2020. It remained the most popular museum for the whole period, although its growth slowed in the final five years.

Museum B began at 80,000 visitors and rose gradually to a peak of 100,000 in 2010. After that, it declined steadily to 60,000 in 2020, becoming the least visited of the three museums. In contrast, Museum C started at only 40,000 visitors, the lowest figure on the graph. It grew slowly to 70,000 in 2010, then increased sharply to 130,000 by 2020, overtaking Museum B between 2015 and 2020.

Word count: 170 words.

Why the Model Answer Works

Task Achievement
The report gives a clear overview of the main trends: Museum A rose steadily, Museum C increased sharply, and Museum B declined after a peak. It selects key figures such as start and end points, the peak for Museum B and the crossing point between Museums B and C. It does not describe every year or give opinions.

Coherence and Cohesion
The answer is organised into an introduction, an overview and two body paragraphs. Each paragraph has a clear purpose. Linking is natural, with phrases such as “overall”, “in contrast” and “after that”. The report is easy to follow without overusing connectors.

Lexical Resource
The answer uses precise change language: “climbed consistently”, “rose gradually to a peak”, “declined steadily”, “increased sharply” and “overtaking”. The vocabulary is varied but always accurate for the data shown.

Grammatical Range and Accuracy
The report uses past simple tenses correctly because the time period is in the past. It includes complex sentences with time clauses and relative clauses, but the meaning stays clear. There are no errors that affect communication.

Common Mistakes That Lower the Band

• Missing the overview
  If you do not state the main trends, your Task Achievement score is limited. Always include a sentence that summarises the overall picture.

• Describing every point
  Listing every year or every small change shows poor selection. Examiners reward choosing key figures, not mechanical description.

• Giving reasons or opinions
  A line graph report is factual. Do not write “this may be because of better marketing” or “the museum is probably more popular now”. Only describe what the graph shows.

• Using the wrong tense
  If the graph shows past data, use past tenses. If it shows future predictions, use “is expected to” or similar. Mixing tenses incorrectly confuses the reader.

• Overusing linking words
  Starting every sentence with “However”, “Moreover” or “Furthermore” is a weakness. Use linking naturally and only when it helps the flow.

• Copying the question
  Paraphrase the task in your introduction. Copying long phrases from the question does not show your own language ability.

• Writing under 150 words
  A short answer loses marks before the examiner even considers quality. Practise writing reports of 170 to 190 words.

For more practice with similar visuals, see IELTS Academic Writing Task 1 bar charts and IELTS Academic Writing Task 1 tables.

How to Practise and Key Takeaways

Regular practice with realistic line graphs is the best way to improve. Write a full report in 20 minutes, then check it against the four criteria. Look for a clear overview, logical paragraphing, accurate change language and correct tenses. You can also practise with IELTS Writing lessons on Pandawise AI to get structured feedback on your reports.

Key takeaways:

• An IELTS Writing Task 1 line graph shows change over time and requires a factual report of at least 150 words.
• Always include an overview of the main trends; without one, your score is limited.
• Group lines with similar patterns and select key figures such as start, end, peaks and lows.
• Use accurate line graph vocabulary IELTS such as “rose sharply”, “declined steadily”, “peaked at” and “levelled off”.
• Match the tense to the time period, and use “is expected to” for future predictions.
• Avoid describing every point, giving opinions and overusing linking words.

For further study, see IELTS Academic Writing Task 1 pie charts and IELTS Academic Writing Task 1 with two or more charts (mixed charts).

Frequently asked questions

How many words should I write for an IELTS Writing Task 1 line graph?

You should write at least 150 words. A report of 170 to 190 words is usually enough to cover the main features without wasting time. Writing fewer than 150 words will lose marks, and a much longer answer may include irrelevant detail.

Do I need an overview in an IELTS line graph report?

Yes. An overview is essential. It summarises the main trends, such as overall rises or falls, the highest line and any crossing points. Without a clear overview, your Task Achievement band is limited, even if the rest of the report is accurate.

What tense should I use for an IELTS Writing Task 1 line graph?

Use the tense that matches the time period shown. For past years, use the past simple. For future predictions, use phrases such as is expected to rise or is projected to fall. If the graph includes both past and future data, use the appropriate tense for each part.

Should I describe every point on the line graph?

No. Describing every year or every small movement shows poor selection. Choose key figures such as the start point, the end point, peaks and lowest points. Group similar trends and make comparisons rather than listing data mechanically.

Can I give my opinion about why the line graph changed?

No. An Academic Task 1 report is factual. You should only describe what the graph shows. Do not suggest reasons or give opinions, because the examiner can only reward information that is actually presented in the visual.