Question

How do you find the x and y intercepts for `x= -3`?

Answer 1

x-intercept at `(x,y)=(-3,0)`
There is no y-intercept.

Explanation:

The x-intercept is the value of `x` when `y=0` (or sometimes specified as the solution to the equation with coordinates `(x,0)`)
Since `x=-3` for all values of `y`
it follows that `x=-3` when `y=0`

The y-intercept is the value of `y` when `x=0` (or alternately the solution point of the form `(0,y)`)
Since `x!=0` not matter what value is assigned to `y`, no such point exists (graphically `x=-3` is a vertical line parallel to, and therefore never intersecting, the Y-axis).