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Nonlinear Functions

SAT Math· difficulty 3/5

The maximum value of y=−x2+4x+1y = -x^2 + 4x + 1 is:

  • A

    44

  • B

    22

  • C

    11

  • D

    55

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Explanation

Vertex at x=−4/(−2)=2x = -4/(-2) = 2, y(2)=−4+8+1=5y(2) = -4 + 8 + 1 = 5.

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