I think it's 4 , but I'm not sure the direction cuz I'm the snapshot , it's showing decreasing but in the history it's showing increasing so I'm not sure would it be +4 since they'll cancel out?

History graph at x = 0m Figure 2. The snapshot graph and Snapshot graph att= 0s 1.0 history graph for a traveling sinusoidal 1.0 wave. 0.5 0.5 O _n y (meters) 0.0 (meters) -0.5 -0.5 -1.0 -1.0 0.0 0.5 1.0 1.5 2.0 0.0 0.5 1.0 1.5 2.0 x (meters) t (seconds) 3. What is the velocity of the traveling sinusoidal wave described in Figure 2? A +Am/s +2m/s C) -4m/s D -2m/s