Answer:
undefined
Step-by-step explanation:
The formula for a slope is m=[tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1}}[/tex]
Let's say (8,1) represents [tex]x_{1}[/tex] and [tex]y_{1}[/tex],
and (8,-6) represents [tex]x_{2}[/tex] and [tex]y_{2}[/tex]
m= [tex]\frac{(-6)-1}{8-8}[/tex]
m= [tex]\frac{-7}{0}[/tex]
A number can't be divided by 0, so the answer would be undefined.
m= undefined