Question

What are the coordinates of A’ after a 90° counterclockwise rotation about the origin.

Answer 1

A' (- 1, - 5 )

Explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x, y ) → (- y, x ), then

A (- 5, 1 ) → A' (- 1, - 5 )