Find the image of: (-4,0,0) in the xy-planes.

Explanation

We have to Find the image of (-4,0,0) in the xy-planes.
since the image is drawn to the xy-plane so the co-ordinate of x & y will not change after the reflection.
but z co-ordinate will become negative.
hence The image of: (-4,0,0) in the xy plane is (-4,0,0).
(because 0 has no negative.)