Question

Find the axis of symmetry for this parabola:

y = -x2 + 6x − 8

Write your answer as an equation.

Answer 1

Use the method of completing the square to write the equation of the given parabola in this form:

(y – k) = a(x – h)2

where a ≠ 0, (h,k) is the vertex, and x = h is the axis of symmetry.