Linear Functions

SAT Math· difficulty 4/5

A truck's fuel consumption can be modeled by f(d)=800.04df(d) = 80 - 0.04d, where dd is miles driven and ff is gallons remaining. What does 0.04-0.04 represent?

  • A

    Gallons consumed per mile

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  • B

    Miles per gallon

  • C

    Total miles

  • D

    Total fuel

Explanation

Slope = rate of change of gallons with respect to miles: gallons consumed per mile.

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