looking at the graph there is a peak on x= 1 and then a peak on x= 4 4-1 = 3 so the peak is 3
the amplitude is the midpoint between the highest point and lowest point on the graph the high point is y=1 and the low point is y = -2 1 + -3 = 3 spaces, midpoint = 3 / 2 = 1.5 so the amplitude = 1.5
