Question

Point G' has coordinates (-5, 2). If it was reflected across the y-axis, what were the coordinates of its pre-image?

(5, 2)
(-5, -2)
(5, -2)
(2, -5)

Answer 1

Reflection across the y-axis flips the x-coordinate sign and keeps y the same.
If G' = (-5, 2), the pre-image was (5, 2).

Answer: (5, 2)