The image of the point (5, -3) after a rotation of 90° counterclockwise about the origin can be found by switching the x- and y-coordinates and negating the new x-coordinate.
So, the new x-coordinate will be -(-3) = 3, and the new y-coordinate will be 5.
Therefore, the image of the point (5, -3) after a rotation of 90° counterclockwise about the origin is (3, 5).