9514 1404 393
Answer:
C. x = -3
Explanation:
The parabola has a vertical orientation (opens downward), so the axis of symmetry is a vertical line. It will have an equation of the form ...
x = constant
The vertex (high point) of the curve is on the axis of symmetry. Its x-coordinate is -3, so the equation of the axis of symmetry is ...
x = -3