What this is showing is a line, at y=-6, so down 6 units on the y axis would be a line drawn horizontally (that is running from left to right), and another line at x=6, so on the x axis at the 6th unit would be a line running up and down.

What exactly are you asking for? Where they intersect? The slope of each?

that makes sense. Only there's not a real equation. You have y=-6 and x=6. There's nothing to solve is what I'm saying. Do you have another equation to use?