1. The problem asks for the equation of the axis of symmetry of a parabola. 2. The axis of symmetry of a parabola is a vertical line that passes through the vertex. 3. The vertex is given approximately as $(3, 8)$. 4. Therefore, the axis of symmetry is the vertical line passing through $x=3$. 5. The equation of the axis of symmetry is $$x=3$$. This line divides the parabola into two mirror images.