What is the slope 0f x=-2

X = -2.

X = A constant = -2.
Therefore, we have a vertical; and its'
slope is undefined:

X = -2 For all values of Y:

(-2,-2), (-2,0), (-2,2).

m = (0-(-2)) / (-2-(-2)) =
(0+2) / (-2+2) = 2 / 0 = UNDEFINED.