Question

How do you graph `y+8=0`?

Answer 1

First, make `y` by itself by subtracting `color(blue)8` from both sides of the equation:
`y + 8 quadcolor(blue)(-quad8) = 0 quadcolor(blue)(-quad8)`

`y = -8`

Since there is no "`x`" in the equation, that means that `y` is a constant and it is always `-8`.

Here is a graph of the line:

(desmos.com)

As you can see, `y` is always `-8`, no matter what the `x` value is.

Hope this helps!