Question

Question #2d2b0

Answer 1

That is a vertical line. The slope is not defined for vertical lines.

Explanation:

Slope is defined for a line through two points `(x_1, y_1)` and `(x_2, y_2)` where `x_1 != x_2`

For any two points on a vertical line we do NOT have `x_1 != x_2`,

So the definition cannot be applied. (And we do not give some other definition for slope of a vertical line.)