Answer:
formula: (y_2-y_1)/(x_2-x_1)
slope: 0
Step-by-step explanation:
1. The formula to find the slope given two points is [tex]\frac{y_2-y_1}{x_2-x_1}[/tex].
2. (Solving)
- [tex]\frac{8-8}{-5-10}[/tex]
- [tex]\frac{0}{-15}[/tex]
- [tex]0[/tex]
Therefore, the slope is 0.
