IELTS writing task 1 pie chart or graph uses. More practice and info at aehelp.com. Follow us on Facebook at facebook.com/WorldESLTutors. This video teaches you the reasons for using pie charts and graphs. When you understand what type of information pie charts and graphs are used for, then you can quickly and effectively write a 150 word paragraph for the IELTS writing task 1 pie chart questions. In the lesson important vocabulary is also given for writing about pie charts; pay attention to these.