Question

The graph of y= -2 can be described as

a horizontal line through the point (0,-2)

a vertical line through the point (-2,0)

a horizontal line through the point (-2,0)

a vertical line through the point (0,-2)

Answer 1

You can think of it like this.

Slope intercept form is,
\(y=mx+b\)
Where m is slope and b is your y intercept.

If m=0 that means that you have a horizontal line, and that term goes away to give you,
\(y=b\)

That means that it is a horizontal line through the point,
\((0,b)\)

Make sense?