Find Stretch to Match a Point

This quadratic is y = a(x + 4)(x - 2). How can you obtain the (x + 4) and (x - 2) from the graph?

Vary the vertical stretch factor "a". True or False....All values of "a" pass through the same x intercepts.

What value of "a" will make the graph pass through the point (-3,4)

True False: Only one value of "a" will pass through the x intercepts AND the point (-3,4)

What is the axis of symmetry?