Which statements are true about the graph of the function f(x) = x2 – 8x + 5? check all that apply.
a. the function in vertex form is f(x) = (x – 4)2 – 11.
b. the vertex of the function is (–8, 5).
c. the axis of symmetry is x = 5.
d. the y-intercept of the function is (0, 5).
e. the function crosses the x-axis twice.