Arrow charts and slope charts are alternatives to multiple pie charts when the data consist of the values or the percentage breakdown of several categories for two time periods.

It's time to dump the pie charts and move to donuts or even waterfalls to show off your data in ways people can better grasp. ... Think of it as a multi-level pie chart. Jim Desmond.

Learn about the various types of graphs, charts and diagrams useful when presenting sets of data, with BBC Bitesize 3rd Level Maths.