Question

How do you find the slope for x=8?

Answer 1

The slope of `x=8` is "undefined"

Explanation:

`x=8` is the equation of a vertical line.

Slope is defined as `("change in " y)/("corresponding change in "x)`

But the value of `x` doesn't change i.e., the change in `x` is always `0`;
so the definition of slope would require division by `0` (which is not defined).