Here's something we came up with to help you consider which chart to use. It was inspired by the table in Gene Zelazny's classic work Saying It With Charts (p. 27 in the 4th. ed)
[The chart chooser is step 7 in the 10-step Extreme Presentation method for designing presentations that drive action. More details on the chart chooser in my blog, on the Extreme Presentation site, and in Advanced Presentations by Design -- 1/20/09]

