look at this graph: \nwhat is the equation of the axis of symmetry?

look at this graph: \nwhat is the equation of the axis of symmetry?
Answer
Brief Explanations:
The graph is a parabola symmetric about the y-axis. The y-axis corresponds to the vertical line where the x-value is always 0, which is the axis of symmetry for this parabola.
Answer:
$x=0$