The graph shows the axis of symmetry for a quadratic function f(x).

On a coordinate plane, a vertical dashed line at (4, 0) is parallel to the y-axis.
Which could be the function?

f(x) = (x + 4)2
f(x) = x2 + 4
f(x) = (x – 4)2
f(x) = x2 – 4