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Linear Functions

SAT Math· difficulty 3/5

The linear function ff has f(0)=−3f(0) = -3 and f(4)=9f(4) = 9. What is f(10)f(10)?

  • A

    2121

  • B

    3030

  • C

    2424

  • D

    2727

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Explanation

Slope =12/4=3= 12/4 = 3. f(x)=3x−3f(x) = 3x - 3. f(10)=27f(10) = 27.

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