Why mixed charts need different vocabulary
A single line graph or bar chart needs trend vocabulary — rise, fall, fluctuate. A single pie chart needs proportion vocabulary — accounted for, comprised, represented. Mixed charts need both, plus a third category that most students never practise: linking vocabulary that connects findings from one visual to the other.
Below are seven vocabulary categories you will need for mixed charts. Each one comes with a visual context, accurate phrases, and an example sentence showing how to use them in a report.
The vocabulary you need
Common vocabulary mistakes
These are real mistakes from student reports on mixed chart tasks. In each case, the problem is not grammar — it is how the two charts are handled in the writing.
"The bar chart shows that water consumption rose from 40 to 60 billion litres. Now I will describe the pie chart. Agriculture was 42%. Domestic was 28%."
"Water consumption rose to 60 billion litres by 2020. The pie chart reveals where this water went, with agriculture alone accounting for 42% of the total."
"Now I will describe the pie chart" is a dead giveaway that the student is writing two separate reports. The examiner sees this immediately. Instead, use natural transitions that show the charts are connected: "the breakdown reveals," "this corresponds to," "given that."
"Total consumption was 60 billion litres. Agriculture was 42%."
"Given that total consumption reached 60 billion litres, agricultural use alone accounted for approximately 25 billion litres."
The left version states two facts next to each other. The right version connects them — it takes the percentage from one chart and the total from the other, and produces a calculated figure. That is the sentence that scores Band 8.
"Agriculture, domestic, industrial and public services accounted for 42%, 28%, 19% and 11% respectively."
"Agriculture was the dominant sector at 42%, followed by domestic use at 28%. Industrial use and public services together comprised the remaining 30%."
"Respectively" is not wrong, but many students use it as a shortcut to list all numbers in one sentence. It produces flat, monotonous writing. Break the data into groups: the dominant category, the mid-range, and the smaller shares. This shows the examiner you can organise information, not just list it.
Tense — it depends on each chart
Mixed charts often combine different time frames. A bar chart spanning 2000 to 2020 is historical. A pie chart showing data for a single past year can use past simple. If one chart shows future projections, you will need to shift tense at that point. The key is consistency within each time period.
For our example task, both charts show past data (2000-2020 and 2020), so past simple works throughout. If your task combines a past trend with a current-year breakdown, you might use past simple for the trend and present simple for the breakdown. Follow the data, not a rigid rule.
Mixed charts are the ultimate test of your writing organisation. The examiner wants to see that you can hold two sets of information in your head and weave them into one coherent report. Students who write two mini-reports get Band 6. Students who connect the visuals get Band 8. Your vocabulary is the tool that makes that connection visible.