Question

What the coordinates of the point (-5,1) after 180° rotation about the origin
Is it (-1,5)

Answer 1

The mapping rule for a 180 degree rotation is:
(x,y) (-x,-y)

1. Multiply the x-coordinate by -1.
2. Multiply the y-coordinate by -1.
3. SImplify

So the coordinate after a 180 degree rotation is: (5,-1)