The rotation that moves (-6, 9) to (9, 6) is a 90° clockwise rotation.
We had a rotation that changes our point (-6, 9) to (9, 6).
Notice that (-6, 9) is on the second quadrant, and (9, 6) is on the first quadrant.
So we have a rotation of 90° clockwise, or a rotation of 270° counterclockwise (these two rotations will end in the first quadrant).
By looking at the options, we can see that the correct one is the first one, a 90° clockwise rotation.
If you want to learn more about rotations:
https://brainly.com/question/4289712
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