Aparabola passes through the points (0,-2) (2,-6) and (5,3) what is the equation of the parabola in standard form?

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.