can someone help me write the equation of axis of symmetry from the graph shown please?

Answer:
Axis of Symmetry ⇨ x = -1
Step-by-step explanation:
⟺ From [tex]y=a(x-h)^2+k[/tex]
Our axis of symmetry equals the value of h.
In easier way, we can look at the graph and notice that the minimum point/vertex is at (-1,-9)
We use the value of h to answer.
Thus, the axis of symmetry is x = -1.
Formulas:
Here is some formulas that might benefit you in Quadratic Function.
[tex]h=-\frac{b}{2a}\\k=\frac{4ac-b^2}{4a}[/tex]
h = Axis of Symmetry (transformation of the graph with x-axis)
k = basically the transformation of the graph with y-axis.