Answer:
Use the slope equation.
m = (y2 - y1 / x2 - x1)
Explanation:
m = (-8 - (-8) ) / (8 - 7)
m = (0) / (1)
m = 0
The slope between these two points is 0. This makes sense if you graph the two points, as they are right next to each other at the same y-coordinate of (-8). The only thing changing here is the x-coordinate of each point.