Answer
They cross the y-axis at the y=3, y=-3, and y=2, respectively.
Work Step by Step
We can see where the two functions cross the y-axis by using the zoom feature as the book describes, or we can press (2nd) and then (graph) and then plug in 0 for x and see the corresponding y value for each function (this will tell us the y intercept). Also, recall because all of the equations are in the form y=mx+b, we know that b, the number being added to x, will be the y intercept.
