Which are true about the function f (x) = -2x²+4x+9? Select all that apply.
(3 points)
The graph has a minimum at (1,7).
The graph has a maximum at (1,7).
The graph has a maximum at (1,11).
The graph has a y-intercept at (0,9).
The graph has a y-intercept at (0,-9).
The function in vertex form is f (x) = -2(x-1)² +7.
The function in vertex form is f (x) = -2(x - 1)² + 1
The graph has a minimum at (1,7).
The graph has a y-intercept at (0,9).
The function in vertex form is f (x) = -2(x-1)² +7.