In IELTS Writing Task 1, the Line Graph type often appears because it helps test your reading skills, data analysis and idea presentation. If you are not familiar with this type of question, don’t worry, this article will guide you step by step to help you feel more confident when you encounter this type of question.
What is Line Graph?
A line graph is a chart that uses lines connecting data points to show changes in data over time or by a factor. This is a type of exercise where you need to describe changes , trends , and comparisons between objects.
For example, a Line Graph might show the change in the number of students participating in extracurricular activities over 10 years.
How to analyze a Line Graph effectively?
When you come across a Line Graph, you should follow these steps:
Step 1: Look closely at the chart
- Horizontal axis : Usually represents time (year, month, or day).
- Vertical axis : Represents numbers such as percentages, numbers, or sales.
- Lines on the chart : Represent the objects being compared.
Step 2: Find important information
- Which object is being compared?
- What year is it from?
- What is the unit of measurement? (%, million people, USD,…)
Step 3: Take notes on the salient features
- What is the highest and lowest value?
- Is there any clear trend? (Increasing, decreasing, or unchanged)
- Where do the lines intersect?
Common trends in Line Graph questions
When analyzing charts, you will often see trends like the following:
- Increase/rise/grow : When data increases over time.
For example: “The number of students increased significantly from 200 to 500 over 5 years.” - Decrease/fall/drop : When the data decreases.
For example: “The percentage of smokers dropped from 30% to 10% between 2000 and 2010.” - Remain stable : When the data does not change significantly.
For example: “The unemployment rate remained constant at 5% throughout the decade.” - Fluctuate : When data fluctuates.
For example: “The stock price fluctuated https://unit.n-ost.org between $50 and $100 during the first quarter.”
How to Compare Data in a Line Graph
When comparing data in a Line Graph, you need to pay attention to:
- Which object showed the most significant growth, rising by 50%?
For example: “Country A showed the most significant growth, rising by 50%.” - When do the objects have the same value?
For example: “In 2015, both products reached the same sales figure of 10,000 units.” - Is the gap between the lines large?
For example: “The gap between Country A and Country B widened significantly after 2010.”
Useful vocabulary :
- Connecting words : while, whereas, compared to, in contrast.
- Trend words : slightly, moderately, dramatically, sharply.
Steps to write an essay for the Line Graph topic
a. Introduction
- Paraphrase the question, introducing the graph you are about to describe.
- For example:
“The line graph illustrates the number of tourists visiting three attractions in a city from 2000 to 2010.”
b. Overview
- Summarize the 2-3 most prominent points you see in the chart.
- For example:
“Overall, the number of visitors to the zoo and amusement park increased, whereas the museum experienced a decline.”
c. Body Paragraphs (Details)
- Body 1 : Describes key audiences and their trends.
For example:
“In 2000, the zoo attracted the least visitors at 5,000. However, its popularity rose steadily, reaching 15,000 in 2010.” - Body 2 : Comparison between objects.
For example:
“By contrast, the museum had the highest number of visitors in 2000 at 20,000, but this figure steadily declined to 8,000 by 2010.”
Specific examples and detailed analysis
Sample question:
“The graph below gives information on the numbers of participants for different activities at one social center in Melbourne, Australia for the period 2000 to 2020. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.”
Sample article:
Introduction :
“The given line chart illustrates changes in the number of incidents in five activities organized at a community center in Melbourne, Australia between 2000 and 2020.”
Overview :
“Overall, the consumption of renewable energy increased in all four countries, with Country A showing the most significant growth.”
Body 1 :
“In 2010, Country A had the highest renewable energy consumption at 40%, followed by Country B at 30%. Over the next decade, both countries experienced steady growth, reaching 60% and 50% respectively in 2020.”
Body 2 :
“Countries C and D started at lower levels, with 20% and 10% respectively in 2010. While Country C saw a gradual rise to 35%, Country D remained relatively stable, ending at 15%.”
Important Notes When Analyzing Line Graph Topics
- No personal opinions : You just need to describe and compare the data, no need to comment or evaluate.
- Focus on the highlights : Don’t try to describe every little detail, pick the main trends.
- Use precise numbers : Emphasize specific time points or values.
Conclude
Analyzing a Line Graph in IELTS Writing Task 1 requires you to observe carefully and write clearly. Practice regularly to get familiar with different types of graphs and improve your writing skills. Wish you study well and get a high score!

