Find the maximum value, mid-line, and amplitude. I got the minimum value, frequency, and period.
I think there is information missing here. Like maybe the top line represents y=0....
If so then the amplitude looks to be approximately 1. The mid-line would be y=-2 and the Maximum would be at y= -1
The maximums will be at \((50\pm120k,-1) \qquad k\in Z\)