The reflection (images) of the point P(3, -7) at the origin is the point P'(-3, 7).
Note : To find the reflection of in the origin change :
(a) The sign of abscissa; i.e., X co- ordinate.
(b) The sign of ordinate; i.e., Y co- ordinate.
The reflection (images) of the point (0,0) at the origin is the the point (0,0) itself.