What the examiner is looking for
Before you write anything, understand what is being marked. Line graph reports are assessed on four criteria, each worth 25% of your Task 1 score. Most students lose marks on the first two — not because of bad English, but because of bad decisions made before they start writing.
The three rules that separate Band 6 from Band 8
Rule 1: You must write an overview. The overview is a short paragraph — two or three sentences — that captures the main trends without any specific numbers. No figures, no data points. Just the big picture. Missing the overview drops your Task Achievement score immediately. It is the single most important paragraph in your report.
Rule 2: Describe trends, do not list numbers. The examiner has the graph in front of them. They do not need you to copy the data. What they want is your ability to identify patterns, group information, and describe movement over time. "Rose sharply then levelled off" tells more than six individual data points.
Rule 3: The data decides the structure. Do not force every report into the same template. Some line graphs have two clear groups — write about each group. Some have a turning point in the middle — split by time period. The best structure is the one the graph is telling you to use.
I have marked thousands of Task 1 reports. The number one reason students score Band 6 instead of Band 7 is a missing or weak overview. The number two reason is listing data instead of describing trends. Fix those two things and your score moves. Everything else is polish.
Now let us write one — step by step
Below is a real IELTS-style line graph. We are going to write a complete Band 8 report on it, one paragraph at a time. At each step, you will see exactly which part of the graph we are looking at and why we are making the choices we make.
Do not start writing yet. Look at the graph and ask: what is the story here? IELTS task designers always build something dramatic into the visual. Find it.
The story: Two countries are going down (UK and Sweden). Two countries are going up (Italy and Portugal). That contrast is the entire structure of your report. You just found it in 30 seconds.
The introduction paraphrases the task prompt. You are not adding analysis here — just showing the examiner that you understood what the graph is about. Change the wording enough to demonstrate real comprehension, not just synonym swapping.
The line graph compares per capita carbon dioxide emissions in the United Kingdom, Sweden, Italy and Portugal over a forty-year period, from 1967 to 2007.
Notice: "shows" became "compares", "CO₂ emissions" became "carbon dioxide emissions", the countries are named explicitly, and "from 1967 to 2007" became "over a forty-year period, from 1967 to 2007." Same information, genuine paraphrasing.
The overview captures the big picture. This is the most important paragraph in your entire report. Two or three sentences. No specific figures. Just the shape of what happened.
Overall, CO₂ emissions per capita declined in both the UK and Sweden over the forty-year period, while Italy and Portugal followed the opposite trend, recording consistent increases. By the end of the period, Sweden's emissions had fallen below those of Italy — a striking reversal from their positions in 1967.
No numbers. No years. Just the shape of what happened — and the most dramatic feature (the crossover) called out directly. That is exactly what the examiner is looking for.
We identified two groups earlier. Start with the countries that declined — UK and Sweden. This paragraph needs specific figures, turning points, and trend descriptions.
The UK recorded the highest emissions throughout the period. Starting at around 11 metric tonnes per person in 1967, the figure peaked at approximately 13 in the early 1970s before declining steadily to roughly 9 metric tonnes by 2007 — still the highest of the four nations. Sweden followed a similar trajectory but with a more dramatic fall: after reaching a peak of around 10.5 metric tonnes in 1977, emissions dropped sharply and consistently, ending the period at just 5.5 metric tonnes.
Two countries. Two stories. Each one is described in phases — a peak, then a decline — not as a list of year-by-year figures. The paragraph ends with a comparison ("still the highest") and a contrast ("more dramatic fall"). That is what Band 8 trend description looks like.
Now the opposite group. Italy and Portugal both rose — but at different speeds and from different starting points. That difference is what makes this paragraph interesting.
In contrast, Italy and Portugal both experienced consistent growth in emissions over the same period. Italy rose steadily from approximately 4.5 metric tonnes in 1967 to nearly 8 by 2007, eventually surpassing Sweden around the year 2000. Portugal, which began at the lowest level of all four countries at roughly 1.5 metric tonnes, saw a more gradual but unbroken increase, reaching about 5.5 metric tonnes by the end of the period.
"In contrast" links this paragraph to the previous one — that is cohesion. The crossover with Sweden is mentioned naturally where it fits. Portugal's starting position ("lowest level of all four countries") adds a comparison without forcing it. Every sentence moves the report forward.
The difference this makes
Here is the same UK data described two different ways. Same graph, same numbers. One reads like a data table. The other reads like an analysis.
"In 1967 the UK's emissions were about 11 metric tonnes. In 1973 they rose to 13. In 1977 they were about 12. In 1987 they fell to about 10. In 1997 they were around 9.5. In 2007 they stood at approximately 9."
"The UK recorded the highest emissions throughout the period, peaking at approximately 13 metric tonnes in the early 1970s before declining steadily to around 9 metric tonnes by 2007 — still the highest of the four countries."
The complete report — all together
Here is the full report we just built, assembled into a single piece. Four paragraphs. Around 190 words. Clear, organised, accurate. This is what a Band 8 line graph report looks like.
The line graph compares per capita carbon dioxide emissions in the United Kingdom, Sweden, Italy and Portugal over a forty-year period, from 1967 to 2007.
Overall, CO₂ emissions per capita declined in both the UK and Sweden over the forty-year period, while Italy and Portugal followed the opposite trend, recording consistent increases. By the end of the period, Sweden's emissions had fallen below those of Italy — a striking reversal from their positions in 1967.
The UK recorded the highest emissions throughout the period. Starting at around 11 metric tonnes per person in 1967, the figure peaked at approximately 13 in the early 1970s before declining steadily to roughly 9 metric tonnes by 2007 — still the highest of the four nations. Sweden followed a similar trajectory but with a more dramatic fall: after reaching a peak of around 10.5 metric tonnes in 1977, emissions dropped sharply and consistently, ending the period at just 5.5 metric tonnes.
In contrast, Italy and Portugal both experienced consistent growth in emissions over the same period. Italy rose steadily from approximately 4.5 metric tonnes in 1967 to nearly 8 by 2007, eventually surpassing Sweden around the year 2000. Portugal, which began at the lowest level of all four countries at roughly 1.5 metric tonnes, saw a more gradual but unbroken increase, reaching about 5.5 metric tonnes by the end of the period.
Read that report again. It is 190 words. Four paragraphs. No wasted sentences. Every paragraph has a clear job — introduce, overview, declining group, rising group. That is what structure looks like when you let the data guide you. You do not need a template. You need to read the graph.
Frequently asked questions
Look for the story the lines are telling. Usually some lines share a direction — rising, falling, or staying flat — and that gives you your groups. For example, if you have five countries and three of them show a steady increase while two decline, that is your split: one paragraph for the rising group, one for the declining group. Within each paragraph, lead with the most dramatic line, then use comparisons to weave in the others. "Country A rose sharply, and Country B followed a similar but more gradual trajectory" keeps it connected rather than listing each line separately.
Do not try to describe every crossover — that turns your report into a tangled list. Instead, mention only the crossovers that matter: the ones that change the ranking or reverse a relationship. For example, if Country A starts highest but ends lowest, that single crossover is worth a sentence. The others can be captured with broader language like "the figures converged over time" or "by the end of the period, the gap between the five countries had narrowed considerably." The examiner wants you to select, not catalogue.
Yes — asymmetry is fine if the grouping is logical. If you have three lines in one group and two in the other, the first paragraph will naturally be longer. That is not a problem. What matters is that each paragraph has a clear purpose and the reader understands why those lines are grouped together. The only thing to avoid is a wildly unbalanced split — one paragraph that fills half a page and another that is two sentences. If the gap feels too large, look for a way to add a comparison or a detail to the shorter paragraph to bring it closer in weight.
There is always a trend — you just have not found it yet. If the lines seem chaotic, zoom out. Ask yourself: did most lines go up or down overall? Did the gap between them widen or narrow? Did one line stand out as dramatically different from the rest? Did the lines start spread apart and end close together, or the opposite? Even "the figures fluctuated throughout the period with no single country showing a consistent trend" is a valid overview — because it tells the examiner what the big picture looks like. The overview does not need a dramatic story. It needs an honest summary.
Use past simple for the historical section and shift to a future form at the point the projection begins. For example: "Between 2000 and 2020, emissions rose steadily. They are projected to continue increasing, reaching approximately 12 metric tonnes by 2040." The tense shift itself is a strength — it shows the examiner you are reading the data carefully and adjusting your grammar to match. Do not use past tense for future data, and do not use future tense for historical data. Let the timeline on the graph guide your tense choices.