Answer:

You get this equation when you plug in the values to find out the y intercept.
g(x)=-2(x+3)^2
The -2 in front is the vertical stretch.
Also, because it is going 3 units to the left, you have to put the 3 on the inside and because it is left you do the opposite and it is +3.
Answer: As GH moves, the reflected image changes its position with respect to the position of the line. The polygons will touch one another if the line of reflection touches polygon ABCD.
Root root 20^2 - 4^2
X = 2