What is the slope of -10,-9 and -10,8"

Question

What is the slope of -10,-9 and -10,8

Answer 1

The line is vertical. There for it has "no slope."

 

Answer 2

Since both points share the same x value, you have a vertical line, and the slope will be undefined.  

 

Using the math, you have (8--9)/(-10--10), which gives you division by 0, which should also tell you undefined.