The vertex of this parabola is at (-3, 6). Which of the following could be its equation?
Ay = -3(x + 3)2 + 6
By = -3(x + 3)2 - 6
Cy = -3(x - 3)2 + 6
Dy = -3(x - 3)2 - 6
Ay = -3(x + 3)2 + 6
By = -3(x + 3)2 - 6
Cy = -3(x - 3)2 + 6
Dy = -3(x - 3)2 - 6