A New York Times article, "New York City Marathon in Six Charts," shows an interesting mix of line, bar, and other graphics. This one represents a newer way to display parts of a whole. 

The first time I saw this type of display was in David McCandless's "Billion Dollar O'Gram."

The newspaper calls these charts "interactive," presumably because some move, but users can't really interact with them. Most of the charts focus on demographics. One titled, "A Race for All Ages, Especially Round Ones," shows an elaborate bar chart of participants' ages and spikes, particularly at 40 and 50. 

Discussion Starters: 

• Which principles from Business Communication: In Person, In Print, Online do these visuals follow?
• What is another way to show the age demographic data, perhaps as a percentage?