By Dominic Corrales
Why are they used?
they are used to compare percentages. and all the portions of the chart must add up to 100%
How do you read a pie chart?
a lot of people forget that pie charts are used to compare a percentage to a whole the whole usually being 100%. and the 100% percent doesn't mean 100 hundred people it could just be a small group of 10. for example there is a group of ten people 5 play baseball the 5 others don't which means it is now in half. so it like this picture. also try to think of it as a pizza or candy bar if i eat 1/4 of the bar i have at 25% of the candy bar.
How do you make one correctly?
your pie chart must include percentages only . they also need to include of course a circle. all portions of the chart must add up to 100%. here is a very helpful video too
Math Made Easy: Create a Pie Graph