The two points are (7,12) and (-5,-9)
The x coordinates of each point are 7 and -5. They add up to 7+(-5) = 2. Divide this result over 2 to get 2/2 = 1. The x coordinate of the midpoint is 1.
The y coordinates of each point are 12 and -9. They add up to 12+(-9) = 3. Divide this result over 2 to get 3/2 = 1.5. The y coordinate of the midpoint is 1.5
To summarize, the final answer is (1, 1.5) which is choice D
