Final answer:
The midpoint between the points (-1, -7) and (-5, 9) is found using the midpoint formula and is (-3, 1), which corresponds to option d.
Step-by-step explanation:
To find the midpoint between the points (-1, -7) and (-5, 9), you need to use the midpoint formula, which is:
(x1 + x2)/2, (y1 + y2)/2
Substituting the coordinates of the given points, we get:
(-1 + (-5))/2, (-7 + 9)/2
(-6)/2, (2)/2
(-3), (1)
Thus, the midpoint is (-3, 1), which corresponds to option d.