In the figure, polygon abcd is dilated by a factor of 2 to produce a′b′c′d′ with the origin as the center of dilation.

point a′ is at
(2 , 1)
(-2, -2)
(1 , -2)
( -2 , 2)
and point d′ is at
(-2 , 2)
(4 , -2)
(4 , 2)
(-2 , 2)

From (0, 0), the points A and D are at (-1, -1) and (2, -1) respectively.

Since the scale factor is 2, every point will be moved twice a distance in both directions. (x and y).

So, multiplying both coordinates by 2, we will get the dilated points.

Hence, A' will be at (2 × (-1), 2 × (-1)) = (-2, -2)

D' will be at (2 × 2, 2 × (-1)) = (4, -2).

i think is g(1)=-1.

hope that i can