The reflection of point (-7, -9) through the origin gives us___
(7, 9)
When reflected through the origin, both the coordinates will change their sign i.e. (x, y) becomes (-x, -y) or (-x, -y) becomes (x, y) depending upon the sign. So, if we have, the coordinates (-7, -9) its reflection through the origin gives us (7, 9) as a resultant point.