CPM Homework Help : PC Problem 4-127

Using the smallest possible horizontal shift, find an equation for the graph below in terms of:

Periodic curve, x axis scaled from negative 2 pi to 2 pi, 4 visible turning points, first at (negative 5 fourths pi, comma negative 1), second at (negative 3 fourths pi, comma 3), y intercept between 0 & negative 1.

$\text{sin }x$
Hint (a):
Draw in the mid-line and max and min lines. Then determine the amplitude, period, and shifts.
$\text{cos }x$

Use the eTool below to visualize this problem.
Click on the link to the right to view the full version of the eTool: PCT 4-127 eTool