Nonlinear Functions

SAT Math· difficulty 5/5

The parabola y=ax2+bx+cy = ax^2 + bx + c has vertex (2,3)(2, 3) and passes through (0,7)(0, 7). What is aa?

  • A

    11

    check_circle
  • B

    1/21/2

  • C

    1-1

  • D

    22

Explanation

y=a(x2)2+3y = a(x-2)^2 + 3. At (0,7)(0, 7): 7=4a+37 = 4a + 3, a=1a = 1.

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