Question

A pie chart

a.
is useful for comparing quantities.
b.
is useful for showing changes over a period of time.
c.
is useful for showing how a "whole" is divided into "parts".
d.
compares quantity using an image to indicate quantity.

Answer 1

c.
is useful for showing how a "whole" is divided into "parts".

Answer 2

c.
is useful for showing how a "whole" is divided into "parts".

Hope it helps!