The given function .

The above equation is equal to this statement .

Find the amplitude.

                                  (The coefficient of is )

Next, find the period.

                 (Substitute )

, so the vertical shift is .

, so the phase shift is to left.

The vertical shift is and graph midline .

The amplitude is and draw the dashed lines units above and below the midline at 

.

The period is , the graph will be stretched.

The graph shift to the left.

Use the amplitude and period to graph the function.