Answer:
The answer is the option D
\(x=6\)
Step-by-step explanation:
we have
\(y=-3(x-6)^{2}+5\)
This is a vertical parabola open downward
The axis of symmetry in a vertical parabola is equal to the x-coordinate of the vertex
The vertex is equal to the point \((6,5)\)
therefore
The equation of the axis of symmetry is
\(x=6\)
