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Linear Functions

SAT Math· difficulty 2/5

For the linear function f(x)=4x−9f(x) = 4x - 9, what is the average rate of change of ff from x=2x=2 to x=7x=7?

  • A

    9

  • B

    4

    check_circle
  • C

    5

  • D

    3

Explanation

For any linear function, the average rate of change equals its slope: 44.

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