Simple but effective line graphs

This simple AP line graphic fthat appeared in an ABC News article shows the relationship between the U.S. demand for oil and the price per barrel. I think it is interesting how the graph clearly shows how the demand reached its lowest point between 2007-2008 before the oil prices started to lower accordingly. By seeing the two graphs side by side with their corresponding timelines, this information is presented much clearer than a text piece could have explained the relationship. By being able to visualize the patterns in the data, it is easy to see why the accompanying article predicts a drop in oil prices would still be a long time coming, even after the demand drops.

http://abcnews.go.com/Business/wireStory?id=13345964