Transformations of Trigonometric functions
y=a sin bx
A= amplitude = the height from the center line to the peak (or to the trough)
Period = 2Pi/ b= distance from one peak to the next (or from any point to the next matching point).
Frequency is how often something happens per unit of time (per "1").
move graph 2 Pi units to the right
move graph 3 units down