Does a pie chart illustrate trends?

Answer 1

Generally, pie charts do not indicate trends. Line, bar and column charts are better for trends. They are designed to show how something is split up, so it does not have that purpose, so the answer would normally be no.

However, a pie chart could indicate a trend if there was a pattern in the successive slices, like if each was getting larger and each represented a time period, like a month. A few pie charts shown together could also indicate a trend, by looking at how the same data changes from chart to chart.