However when we are starting with a formula there are easier ways to produce a graph. The function f of x is graphed. This is found by dividing your regular period by the absolute value of B.
The amplitude has changed from 1 in the first graph to 3 in the second just as the multiplier in front of the sine changed from 1 to 3This relationship is always true.
Read about graphing linear functions. You have to use a ruler to plot them. We graph functions in exactly the same way that we graph equations. Remember sqrt x tells you to use the principal root which is the positive root.