Question

What is the slope of the line y = -8?

Answer 1

`"slope "=0`

Explanation:

`"the line with equation " y=-8" is a horizontal line"`
`"parallel to the x-axis and passing through all points in"`
`"the plane with a y-coordinate of - 8 and as such has a"`
`"slope of zero"`
graph{y-0.001x+8=0 [-20, 20, -10, 10]}

Answer 2

The line is horizontal, passing through the `y`-axis at `(0,-8)`

`m =0`

Explanation:

`y = -8" "` is the equation of a straight line and can therefore still
`color(white)(...................)` be written in the form `y= mx+c`

Notice that there is no `x-` term... This means that it is `0` and the equation is actually:

`y = 0x -8`
`m =0`

No matter what value of `x` is used, the value for `y` will still be `-8`

The line is horizontal and therefore has a slope of `0`