Y = -8 simply means for every x coordinate the y coordinate is -8, therefore it creates a horizontal line at y = -8.
X intercepts are when y = 0. Y intercepts are when x = 0.
In this case of the line, y = -8 there is no x intercept because y doesn’t equal 0.
However there is a y intercept at (0,-8) because y is -8 for every input including 0.
If you have any other questions feel free to ask.
The answer to this question is c=3
