By Alvin Alexander. Last updated: June 4, 2016
This graph from ESPN's mobile web site is excellent. It's from the 2013 NCAA Men's Basketball Final, with Louisville vs Michigan, and clearly shows Louisville flatlining in the first half, then surging back in a big way. It really shows the flow of the game, including Louisville increasing the margin about 3/4 of the way through the second half, before the gap closed again at the end.