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Linear Functions

SAT Math· difficulty 2/5

A linear function ff has f(0)=5f(0) = 5 and f(2)=11f(2) = 11. What is f(4)f(4)?

  • A

    15

  • B

    17

    check_circle
  • C

    19

  • D

    13

Explanation

Slope =(11−5)/(2−0)=3= (11-5)/(2-0) = 3. So f(x)=3x+5f(x) = 3x + 5 and f(4)=17f(4) = 17.

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