Question

A sinusoidal graph has a maximum at the point (–40, 3) and a midline of y = – 12. Determine the amplitude of the graph.

Answer 1

The amplitude of y=sin(x) is 1 with a maximum of y=1 and minimum of y=-1.It’s amplitude is 1 because that is the distance the max (y=1)is from the mid line (y=0)or the distance the min (y=-1) is from the mid line (y=0).

Answer 2

15

Explanation:

The amplitude of y=sin(x) is 1 with a maximum of y=1 and a minimum of y=-1. It's amplitude is 1 because that is the distance the max( y=1 )is from the mid line (y=0) or the distance the min( y=-1 ) is from the mid line (y=0).

So we just need to find the distance the mid line, y=-12, and the max,y= 3, is from each other.

3--12=3+12=15