Graphing quadratic equation problem?

The above shows part of the graph of the function f(x) = -x2 − 8x − 7

What is the equation of its axis of symmetry?

choices

A. y = - 4
B. x= - 4
C. x = - 3
D. y = 9
Update: I mean its f(x) = - x^2 - 8x - 7
8 answers 8