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Linear Functions

SAT Math· difficulty 3/5

A linear function ff has f(2)=9f(2) = 9 and f(8)=−3f(8) = -3. What is the average rate of change over [2,8][2, 8]?

  • A

    −2-2

    check_circle
  • B

    22

  • C

    −12-12

  • D

    1212

Explanation

(−3−9)/(8−2)=−12/6=−2(-3 - 9)/(8 - 2) = -12/6 = -2.

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