slope chart

Nice slope chart from the Washington Post. The interactivity allows the user to pick out certain states and get additional information. 

http://www.washingtonpost.com/wp-srv/special/politics/state-vs-federal-exchanges/

JS

Slope charts (and their big brothers the parallel coordinates plot) are a great (and underutilized) way to show relationship within datasets. More visualization applications should support them.

RS