Question

How do you find the slope and y intercept for `y=-2`?

Answer 1

`y=-2`
`color(white)("XXXX")`has a slope of `0` and
`color(white)("XXXX")`a y-intercept of `(-2)`

Explanation:

The fact that `y=-2` has a slope of `0` follows from the observation that it is a horizontal line.
The y-intercept is the value of `y` when `x=0`; since `y=-2` for all values of `x` (including `0`), the y-intercept is `-2`

Alternately
you could rewrite the equation into slope intercept form:
`color(white)("XXXX")` `y=mx+b` with a slope of `m` and a y-intercept of `b`

`y=-2` is equivalent to
`color(white)("XXXX")` `y = 0*x +(-2)` which is slope-intercept form
`color(white)("XXXX")` `color(white)("XXXX")`with slope `0` and y-intercept `-2`

Answer 2

Slope `=0`
Y-intercept`=-2`

Explanation:

Your equation represents a horizontal line passing through `y=-2` with slope equal to zero (it is horizontal so it is neither going up nor down).

Graphically: