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Nonlinear Functions

SAT Math· difficulty 3/5

Find the vertex of y=x2+6x+5y = x^2 + 6x + 5.

  • A

    (3,−4)(3, -4)

  • B

    (−3,−4)(-3, -4)

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  • C

    (−3,4)(-3, 4)

  • D

    (3,4)(3, 4)

Explanation

x=−b/(2a)=−3x = -b/(2a) = -3. y(−3)=9−18+5=−4y(-3) = 9 - 18 + 5 = -4. Vertex (−3,−4)(-3, -4).

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