What will the coordinates of the image of point M be after it is rotated 90 degrees clockwise about the origin

The originals coodinates are (8,1). After a 90° rotation, we have to change the order of the coordinates and change the sig to the new y-coordinate like this
[tex](8,1)\rightarrow(1,8)\rightarrow(1,-8)[/tex]so the new coordinates are (1,-8)