Question

Whats the X and y intercepts if y=-1

Answer 1

This is a vertical line at -1. So the y intercept is -1 and it never crosses the x axis.

Answer 2

Oops! I mean horizontal line!

Answer 3

Okay. Let me start over.
This is a horizontal line, just like the x axis, but 1 unit below it.
Therefore the y intercept is -1 and there is no x intercept, because it's parallel to the x axis, it never crosses it.

Answer 4

x=0,y=-1