Question

Identify the vertex and y-intercept of the graph of f(x)=-3(x+6)^2+9.
A) (-6,-9), y-intercept -99
B) (6,9), y-intercept -9
C) (-6,9), y-intercept -99
D) (6,-9), y-intercept -9

Answer 1

yes, I am sorry, the answer is C. I have to make sure that the right answer.

Answer 2

\[f(x)=y=a(x-h)^2+k,\text{ vertex is given by }(h,k).\\
y\text{-intercept can be found by finding }f(0).\]