Answers:
Amplitude = 3
Period = 2
Step-by-step explanation
The highest and lowest points occur when y = 2 and y = -4 respectively. The vertical distance between these points is 6 units (because 2 - (-4) = 2+4 = 6)
Half of this is 6/2 = 3 which is the amplitude. It's the vertical distance from the horizontal midline to either the highest point or the lowest point.
The horizontal distance between (-0.25,2) and (0.75,-4) is |-0.25-0.75| = 1 unit. This represents half of the period. A full period goes from one peak to another adjacent peak. Therefore, the period is 2*1 = 2 units. The sine graph repeats itself every 2 units on the x axis. Notice that the distance between the roots (-0.642,0) and (1.358,0) is 2 units.