Question

Question 3 The point W(-13,9) was transformed to W'(-9, -13) by a rotation around the origin. Which of the following best describes this rotation?

Answer 1

Remember that a rotation about the origin of 90° counterclockwise is given by the rule:

`(x,y)\rightarrow(-y,x)`

If this rule is applied to the point W, we get W':

`W(-13,9)\rightarrow W^(\prime)(-9,-13)`

Therefore, the rotation that was performed is a 90º counterclockwise rotation.

Then, the answer is option C.