Linear Functions

SAT Math· difficulty 4/5

The number of subscribers SS to a service after mm months is S(m)=1200+75mS(m) = 1200 + 75m. After how many months will the service have 30003000 subscribers?

  • A

    20

  • B

    26

  • C

    22

  • D

    24

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Explanation

1200+75m=30001200 + 75m = 3000, so 75m=180075m = 1800 and m=24m = 24.

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