Linear Functions

SAT Math· difficulty 4/5

The function T(d)=0.5d+60T(d) = 0.5d + 60 gives the time in minutes to deliver dd packages. Which best describes the meaning of the slope?

  • A

    Each package adds 0.5 minutes to delivery time

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  • B

    It takes 0.5 minutes per delivery total

  • C

    Each minute delivers 0.5 packages

  • D

    Setup takes 60 minutes per package

Explanation

Slope 0.50.5 minutes per package: each additional package adds 0.5 minutes.

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