Question

The point (5, -2) is rotated 90° about the origin. Its image is

a.(-2, 5)
b.(2, 5)
c.(-5, 2)

Answer 1

rotated 90° about the origin
(x,y) = (-y, x)

so (5, -2) is rotated 90° about the origin = (2, 5)

answer
b.(2, 5)