The function f(x) = β3x2 + 36x β 119 written in vertex form is f(x) = β3(x β 6)2 β 11. Which statements are true about the graph of f(x)? Select three options.
The axis of symmetry is the line x = 6.
The vertex of the graph is at (β6, β11).
The parabola has a minimum.
The parabola opens down.
The value of h, when the equation is written in vertex form, is positive.