8)
Which are true about the function f(x)=−2x2+4x+9
? Select all that apply.
(3 points)
Responses
The graph has a minimum at (1,7).
The graph has a minimum at (1,7).
The graph has a maximum at (1,7).
The graph has a maximum at (1,7).
The graph has a maximum at (1,11).
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 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 of x is equal to negative 2 times open paren x minus 1 close paren squared plus 7.
The function in vertex form is f(x)=−2(x−1)2+11