Question

What is the line of symmetry for the graph of y = -3x2 + 12x - 11?

Answer 1

for a parabola

\[y = ax^2 + bx + c\]

the line of symmetry is

\[x = \frac{-b}{2 \times a}\]

in your question a = -3 and b = 12

just substitute and calculate the answer.