Question

What is the line of symmetry for the parabola whose equation is y = x2 - 12x + 7?

Answer 1

x = 6

Explanation:

Please write this as y = x^2 - 12x + 7 to indicate the exponentiation.

The coefficients of these three terms are a, b and c: 1, -12 and 7.

The equation of the axis (line) of symmetry is

-b -(-12)

x = --------- = ----------- = 6

2a 2(1)