Final answer:
The pair of points with equal x-coordinates is Points Q and R.
Step-by-step explanation:
In this question, we are given four points: T (4, 6), S (5, -6), R (-5, -7), and Q (-5, 6). We need to determine which pair of points have equal x-coordinates.
The points Q and R have the same x-coordinate of -5. Therefore, the answer is (a) Points Q and R.