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It is very important that you know how to correctly use prepositions in graphs in the IELTS writing task 1.
If you put them in the wrong place or use the wrong preposition you may confuse what you are trying to say.
First, take a look at this graph model answer and notice how some of the prepositions in the graph are used. They have been highlighted.

IELTS Line Graph – Car Thefts
Model Answer
The line graph compares the number of car thefts for every thousand vehicles in four countries from 1990 to 1999. Overall, it can be seen that car thefts were far higher in Great Britain than in the other three counties throughout the whole time frame.
To begin, car thefts in Sweden, France and Canada followed a fairly similar pattern over the first five years, all remaining at between 5 and 10 per thousand. The general trend though for France and Canada was a decline in the number of vehicles stolen over the period, with both at around 6 in 1999. In contrast, Sweden experienced an upward trend, starting the period at approximately 8, and finishing at just under 15.
Interestingly, car thefts in Great Britain started at 18 per thousand, which far exceeded that of the other countries. It then fluctuated over the next nine years, reaching a peak of 20 thefts per 1000 in 1996, and ending the period slightly lower than where it began, at approximately 17 per thousand.
Prepositions in Graphs Practice
Now, take a look at the sentences below. Decide which prepostion from the box should go in the gap and write it in.
Note: Write in small letters and do not leave any gaps or your answer may get marked as wrong.
Choose the correct word to go in the gap
| with | at | in | by | at |
| to | between | from | to | of |
1. In may, the price of gold rose slightly $1,500.
2. Holidays to foreign destinations remained constant about 85,000 per month for the last two months of the year.
3. Profits increased 4 million dollars to 6 million dollars last year.
4. From 2001 to 2010, the price of electricity has increased 125%.
5. Bike sales reached a peak 20,000 in September.
6. There is a sharp increase in traffic levels from 8am to 9am, nearly 3000 cars traveling on the road.
7. The last decade has seen a steep increase the number of people diagnosed with diabetes.
8. At the start of the year, the turnover of the company stood £1.3 million.
9. During the summer, student numbers at the school fluctuate 150 and 170 per week.
10. Following this, the number then fell a low of 20 per month.
