P(2,3), Q(2,7) and R are three points on a rectangular coordinate plane. Given that the area of triangle PQR is 20 square units, suggest 2 possible pairs of coordinates of R if R lies in quadrant III.
If R lies in quadrant III, the x-coordinate and y-coordinate of R would both be negative.
Possible pair of coordinates for R:
1. R (-4, -5)
2. R (-3, -6)