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

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
 
 The equation of the axis of symmetry for the parabola is:
 x = -2

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