Question

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

Explanation:

Step1: Identify parabola vertex

The vertex of the parabola is at $(0, 0)$.

Step2: Find axis of symmetry

For a vertical parabola, the axis of symmetry is the vertical line through the vertex, given by $x = h$ where $(h,k)$ is the vertex.
$x = 0$

Answer:

$x=0$