Final answer:
The midpoint coordinates between points A (2, -9) and G (-14, 3) are calculated using the midpoint formula and are (-6, -3), which corresponds to answer D.
Step-by-step explanation:
The coordinates of the midpoint of the line segment between points A (2, -9) and G (-14, 3) can be calculated using the midpoint formula, which is (x1 + x2)/2, (y1 + y2)/2. Applying this formula, we calculate the midpoint's x-coordinate as (2 + (-14))/2 which equals -6, and the y-coordinate as (-9 + 3)/2 which equals -3. Therefore, the correct answer is D) (-6, -3).