1. The problem statement, all variables and given/known data The figure is a snapshot graph at t = 0s of two waves approaching each other at 1.0 m/s. Draw six snapshot graphs, stacked vertically, showing the string at 1s intervals from t = 1s to t = 6s. 2. Relevant equations http://session.masteringphysics.com/problemAsset/1071118/9/21.EX02.jpg 3. The attempt at a solution Apparently I'm an idiot because this question is very easy. I literally shifted the graphs according to their velocity vector over 1m after each second. What am I doing wrong?