Write an equation of the parabola in intercept form given the points (0,0), (4,0), and (3,2.25).
a) y = -0.25x(x-3)(x-4)
b) y = -0.25x(x+3)(x-4)
c) y = 0.25x(x-3)(x-4)
d) y = 0.25x(x+3)(x-4)