Question

How do you calculate the slope, x intercept, and y intercept of the following equation: `x=-3`?

Answer 1

You have only the x-intercept.

Explanation:

Your equation represents a vertical line passing through `x=-3`.
It doesn't have a y-intercept and its slope is indeterminate;
The slope is given as `(Deltay)/(Deltax)` but `x` is always `-3` so that `Deltax=0` for any `Deltay`: the expression for the slope gives you a division by zero which is indeterminate.
The only thing is the x-intercept that will be found at exactly `x=-3`.