Do the following for the points 5 2 3 1 1 1 3 1 If you are entering decimal approximations enter at least five decimal places a Find the equation for the best fitting parabola y ax bx c for these points y 7 176 x 2 7x 220 673 880 b Find the equation for the best fitting parabola with no constant term y ax bx for these points y c Find the equation for the best fitting parabola with no linear term y ax c for these points y