Question

(x, y) -----> (-y, -x) is a rotation of 90 degrees counterclockwise. false true

Explanation:

Step1: Recall rotation rule

For a 90 - degree counter - clockwise rotation of a point $(x,y)$ about the origin, the transformation rule is $(x,y)\to(-y,x)$.

Step2: Compare with given rule

The given transformation is $(x,y)\to(-y, - x)$ which is not the correct rule for a 90 - degree counter - clockwise rotation.

Answer:

False