The vertex of the parabola below is at the point (2, 4), and the point (3, 6) is on the parabola. what is the equation of the parabola? a. y = 2(x - 2)2 + 4 b. y = 3(x - 4)2 + 2 c. y = 6(x - 2)2 + 4 d. x = 4(y - 3)2 + 1