May I please get help with this for I am confused and have tried many times to figure out how to rotate the figure 90° clockwise to find the original point on the final part

A rotaion of a point 90° clockwise is given by:
[tex](x,y)\rightarrow(y,-x)[/tex]The coordinates of the original point are (1,-3), applying the rule to this point we have:
[tex](1,-3)\rightarrow(-3,-1)[/tex]Therefore:
Point in the original figrue (1,-3)
Point in the final figure (-3,-1)