Question

Help me!

Find the slope, if it exists

x=-7

Answer 1

does not exist

Answer 2

the graph of x = -7 is a vertical line, and vertical lines do not have slopes

Answer 3

so it would be undefined?

Answer 4

Yes

Answer 5

the slope is undefined. One of the previous answerers erred in that he forgot to use 2 points instead of only one. So, let's take the points (1, -7) and (2, -7).

m = (2 - 1) / (-7 - -7)
m = 1 / 0

Since you cannnot divide by 0, m = undefined.

This is always true of vertical lines. The equation of a vertical line will always look like the one you provided, for example:
x = 1
x = 2
x = -5
x = -43575986
x = 0