he graph of the function f(x) = −3x2 − 3x + 6 is shown. Which statements describe the graph? Check all that apply. The vertex is the maximum value. The axis of symmetry is x = . The domain is all real numbers. The range is all real numbers. The x-intercepts are at (−2, 0) and (1,0). The function is decreasing from (−∞, 6.75).