Question

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

Explanation:

Step1: Identify vertex x-coordinate

The vertex of the parabola is at $x=-2$, visible as the lowest point of the curve, and the axis of symmetry is the vertical line through the vertex.

Step2: Write axis of symmetry equation

A vertical line has the form $x = a$, where $a$ is the x-coordinate of the vertex.

Answer:

$x=-2$