Answer:
3/2
Explanation:
We have two right triangles. The scale factor is the sides of the dashed triangle divided by the sides of the triangle with the painted line.
Dashed:
One side is 9(3 -(-6)) = 3 + 6 = 9
The other side is also 9.
Painted:
The sides are 6(4 - (-2) = 4 + 2 = 6).
Scale of the dilation:
Dilated/original = 9/6 = 3/2