Question

Find the axis of the graph of the function.

f(x) = 4x^2 + 8x + 7

Answer 1

Is it asking for when Y will be zero? if so replace f(x) with 0 and solve.

Answer 2

if you mean axis of symmetry thats x=-b/2a

when your equation is in the form f(x)=ax^2+bx+c

so
x=-8/2(4)
x=-8/8
x=-1