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Linear Equations in One Variable

SAT Math· difficulty 4/5

A delivery service charges f(d)=5+1.20df(d) = 5 + 1.20d, where dd is distance in miles. What does the slope 1.20 represent in context?

  • A

    Number of deliveries

  • B

    Total cost

  • C

    Base fee

  • D

    Cost per mile delivered

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Explanation

Slope = additional cost per additional mile.

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