Answer:
J' (3, 2)
Explanation:
when a point is rotated 90 degrees clockwise, the point goes from (x, y) to (y, -x). You can imagine this rule or come up with it by doing a rotation on a graph, but really it's just a rule you should memorize.
So, apply (x, y) --> (y, -x) to this point:
(-2, 3) --> (3, 2)
J' (3, 2)