Question

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

Explanation:

Step1: Identify parabola symmetry axis

The axis of symmetry of a parabola is the vertical line that divides it into two mirror-image halves, passing through its vertex.

Step2: Locate vertex on graph

The vertex of the parabola lies on the y-axis, where $x=0$.

Step3: Define axis equation

The vertical line through $x=0$ is the axis of symmetry.

Answer:

$x=0$