Linear Functions

SAT Math· difficulty 3/5

If f(x)=2x+7f(x) = -2x + 7 and f(a)=3f(a) = -3, what is the value of aa?

  • A

    5-5

  • B

    5

    check_circle
  • C

    2

  • D

    2-2

Explanation

2a+7=3-2a + 7 = -3, so 2a=10-2a = -10 and a=5a = 5.

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