The dilation rule df3(x, y) is applied to aabc, where
the center of dilation is at f(1, 1).
the distance in the x-coordinates from a(-2, 2) to the
center of dilation f(1, 1) is yunit(s).
the distance in the y-coordinates from a(-2, 2) to the
center of dilation f(1, 1) is yunit(s).
the vertex a' of the image is