Nonlinear Functions

SAT Math· difficulty 3/5

What is the axis of symmetry of y=x26x+8y = x^2 - 6x + 8?

  • A

    x=6x = 6

  • B

    x=3x = -3

  • C

    x=6x = -6

  • D

    x=3x = 3

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Explanation

Axis of symmetry: x=b/(2a)=6/2=3x = -b/(2a) = 6/2 = 3.

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