Slope: -2.5
Work: I gather the two points on the line (Which was 5,2 and 3,7) and I used the slope equation. (Slope Equation is y2 - y1 / x2 - x1) After that, I got -5/2, and I divided it, and I got -2.5
PS: I don't need the $35, I'm just glad I can help you.