Question

in progress
check for understanding: rotations
not graded
directions
answer the question below to check your understanding and move forward in the course! this quiz is not
which of the following ordered pairs shows a change of 270° clockwise?
select the correct answer
(-x,y)
(x,y)
(y,x)
(-y,x)

Explanation:

Step1: Recall rotation rule

A $270^{\circ}$ clock - wise rotation is equivalent to a $90^{\circ}$ counter - clockwise rotation. The rule for a $90^{\circ}$ counter - clockwise rotation of a point $(x,y)$ about the origin is $(x,y)\to(-y,x)$.

Answer:

$(-y,x)$