Linear Functions

SAT Math· difficulty 2/5

The function ff is defined by f(x)=3x4f(x) = 3x - 4. What is the value of f(5)f(5)?

  • A

    7

  • B

    15

  • C

    19

  • D

    11

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Explanation

f(5)=3(5)4=154=11f(5) = 3(5) - 4 = 15 - 4 = 11.

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