Question

Which of the following is the rule for rotating the point with coordinates (x,y), 180° clockwise about

the origin?

Answer 1

A. (x, y) ⇒ (-x, -y)

Explanation:

Rotation 180° in either direction is equivalent to reflection across the origin, and/or reflection across both axes (in either order). It negates both coordinates.

(x, y) ⇒ (-x, -y) . . . . rotation 180°