Question 4 (1 point) A parabola has a vertex at $(-3,2)$ What is the equation of the axis of symmetry a) $y=-2$ b) $y=2$ c) $x=-3$ d) $x=3$

Step 1 ：The vertex of a parabola is given as (-3,2).

Step 2 ：The axis of symmetry for a parabola is a vertical line that passes through the vertex of the parabola.

Step 3 ：Therefore, the equation of the axis of symmetry is \(x = -3\).

Step 4 ：Final Answer: The equation of the axis of symmetry is \(\boxed{x = -3}\).