Question

Which rotation maps point K(8, –6) to K’(–6, –8)?
180° counterclockwise rotation
90° clockwise rotation
90° counterclockwise rotation
180° clockwise rotation

Answer 1

90° clockwise rotation.

Reason: A 90° clockwise rotation sends (x, y) to (y, −x). For (8, −6) this gives (−6, −8), which matches K'.