Which function has a vertex at the origin
Af(x)= (x+4)^2
Bf(x)= x(x-4)
Cf(x)= (x-4)(x+4)
Df(x)= x^2
Af(x)= (x+4)^2
Bf(x)= x(x-4)
Cf(x)= (x-4)(x+4)
Df(x)= x^2