The intercepts of the third degree polynomial corresponds to the zeros of the equation y = d*(x-a)*(x-b)(x-c) Where a, b and c are the roots of the polynomial and d an adjustment coefficient. y = d*(x+2)*(x)*(x-3) Lets assume d = 1, and we get y = (x+2)*(x)*(x-3) = x^3 - x^2 - 6x We graph the equation in the attached file.