Question

What is the equation of the axis of symmetry for the parabola y equals start fraction one over four end fraction left parenthesis x plus two right parenthesis squared minus seven?

x = −8
x = start fraction one over four end fraction
x = 2
x = −2

Answer 1

The axis of symmetry is "x = -2."

Explanation:

I just got it right on the test.

Answer 2

For this case we have the following function:
y = 1/4 (x + 2) ^ 2 - 7
We derive the equation:
y '= 1/2 (x + 2)
Equaling zero we have:
1/2 (x + 2) = 0
We clear the value of x:
x + 2 = 0
x = -2
Answer:
The equation of the axis of symmetry for the parabola is:
x = -2