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

Iwould think that the correct answer is 8.1

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for