Linear Functions

SAT Math· difficulty 4/5

The temperature in degrees Celsius after tt minutes is T(t)=250.4tT(t) = 25 - 0.4t. What does 0.4-0.4 represent in this context?

  • A

    Temperature reaches 0 after 0.4 minutes

  • B

    Initial temperature

  • C

    Temperature decreases by 0.4 degrees per minute

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  • D

    Total decrease in temperature

Explanation

Slope 0.4-0.4 means temperature changes by 0.4-0.4 degrees Celsius per minute (decreases by 0.40.4).

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