Finding the slope using two points:
The formula for slope is
[tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]
In this case...
[tex]y_{2} =10\\y_{1} =-5\\x_{2} =8\\x_{1} =8[/tex]
^^^Plug these numbers into the formula for slope...
[tex]\frac{10-(-5)}{8-8[/tex]
[tex]\frac{15}{0}[/tex]
Your slope is undefined. This means that you line is vertical
Hope this helped!
~Just a girl in love with Shawn Mendes