Question

Calculate the slope of the line between the points (9,-4) and (9,1)

A. Undefined
B.O
C.-5/18
D. None of these.
E. -1/6

Answer 1

A. Undefined

Explanation:

If we did the slope formula we would get

`(1-(-4))/(9-9) =(5)/(0)`

Dividing by 0 yields an undefined value.

(This is a vertical line, which is not a function, so the slope cannot be defined)