To solve the equation graphically, we set one side equal to Y and we let the other side equal Y, and we graph both of these and look where the two intersect. So if we have Y equal X -, 4, we know that the Y intercept is the .0 negative 4, and we know that the slope is 1, so zero -4. So we're going to go down four, and then the slope of one up 1 / 1, up 1 / 1, up 1 / 1. We know that Y equal 1 is a horizontal line, so we look for a horizontal line. So it's got to be the answer of C.