Linear Functions

SAT Math· difficulty 3/5

A phone plan costs P(t)=0.10t+25P(t) = 0.10t + 25 dollars per month, where tt is talk minutes used. What does the 2525 represent?

  • A

    Cost per minute of talk time

  • B

    Fixed monthly base fee

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  • C

    Number of free minutes

  • D

    Maximum monthly cost

Explanation

The y-intercept 2525 is the cost when t=0t = 0, the fixed monthly fee.

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