Answer:
x= -4 is the axis of symmetry
Step-by-step explanation:
The parabola is written in the form y = a (x-h)^2 +k
The vertex is (h,k) and the axis of symmetry is at x=h.
Given f(x) = 3(x- -4)^2 + 1, the vertex is (-4,1) so the axis of symmetry is x= -4
