Determine the image of the point (-5,-1) under a rotation of 90 about the origin

The rule for a 90 degree rotation is

(x,y)——>(-y,x)

So let’s take the coordinate (-5,-1) and let’s replace the x and y places together!!!

So that would give us -1•-1 which is just 1
Then -5•1 which is just -5

So the answer is

(1,-5)