Question

"Which of the following are rules used for rotating a figure counterclockwise about the origin? Select all that apply."

a. (x, y) → (-x, -y)
b. (x, y) → (-x, y)
c. (x, y) → (x, -y)
d. (x, y) → (y, -x)
e. (x, y) → (-y, x)

Answer 1

I’m pretty sure it’s B

Answer 2

a., d., and e.

a. (x, y) → (-x, -y), for 180° CCW

d. (x, y) → (y, -x), for 270° CCW

e. (x, y) → (-y, x), for 90° CCW