math(Please please help!!!)
posted by Hannah on .
1) Find the period and the amplitude.
y= 3 sin 2x
Please explain!!! I do not know how to do this.

The amplitude is how far y can increase above (or decrease below) the average value. The average value is zero. The maximum value is 3. The amplitude is therefore 3.
The period is how much x must increase in fr y to return to the original value (regardless of x).
2x must increase by 2 pi for that to happen. Therefore the period is pi