Question

Using the slope​ formula, find the slope of the line through the given points.

(−8,−1) and (-1,-1)
What is the slope of the​ line? Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.
A.
The slope of the line ------ ​(Type an integer or a simplified​ fraction.)
B.
The slope of the line is undefined.

Answer 1

Answer is B. the slope of the line is undefined. Undefined is like a "zero"


I got this answer by:
I use slope formula
y^2-y^1/x^2-x^1
-1-(-1)/-1-(-8)
0/7=0
Therefore, zero is undefined