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http://ielts-simon.com/ielts-help-and-english-pr/2016/11/ielts-writing-task-1-more-overview-practice.html

The line graph gives information about the figures for rubbish produced by three companies namely A, B and C from 2000 to 2015.

Overall, the amount of waste was produced by company A and B saw a downward trend while that of company C witnessed an upward trend. The figure of trash of company A was by far the highest among three companies almost all the time surveyed.

In the year 2000, there was the highest amount of waste made by company A, at about 12 tonnes while the lower points were recorded in company B and C, at over 8 tonnes and approximately 4 tonnes, respectively. The following five years experienced an gradually increase in figure of company B then reaching a peak, at roughly 10 tonnes before decreasing significantly during the remainder of the period.

In 2010, the figure for company B's waste equaled that of company C, at about 7 tonnes. In 2015, the figure for company C rose steadily then reaching the highest point , at over 10 tonnes whereas company A and C were responsible for roughly 8 tonnes and around 3 tonnes, respectively.