Exercises: Interpret Parameters in Context

Work through each section in order. Show your work where indicated.

Grade 9·21 problems·~30 min·Common Core Math - HS Functions·group·hsf-le-b-5

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Fluency Practice

A cooling object's temperature is $T(t) = -3t + 90$ , where $t$ is time in minutes and $T$ is temperature in degrees Celsius.

Which interpretation of the y-intercept is correct?

The temperature decreases by 90 degrees per minute.

The initial temperature of the object is 90 degrees Celsius (at $t = 0$ ).

The temperature decreases by 3 degrees initially.

The object reaches 90 degrees after 3 minutes.