You can put this solution on YOUR website! y = -2 is a line in which all points have the y-value -2. The line has a slope of 0 (horizontal line) since the y-value does not change for any value of x.
The point-intercept form for the equation of a line is:
y = mx + b
We can write y = -2 as y = 0x - 2; slope = 0, y-intercept = -2
The graph is below: