Snapshot graph of Superposition

[mcnealymt]

Homework Statement

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.

Homework Equations

http://session.masteringphysics.com/problemAsset/1071118/9/21.EX02.jpg

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?

 

[lewando]

You realize that the image shown for t=0 is one graph, D(x), not two graphs. You might want to attach an image of what you did at, say, t=3.