The image after the rotation is (3, -1).
How to get the image after the rotation?
A rotation of 90° first changes the order of the values in the initial point, and also moves the point to the next quadrant.
Here (-1, -3) is in the third quadrant, so after the rotation it will be on the fourth quadrant, where x is positive and y negative.
Also, taking the permutation, we will have x = 3 and y = -1
(3, -1) is the image.