<PRE><B>Question 258246</B>
The chart to the right shows how the number of chirps per minute of the snowy tree cricket is related to temperature.
Timely Noise 
t, Temperature
(°F) N(t), Number of
Chirps/Minute
55 60
60 80
65 100
70 120
75 140
80 160
Crickets are usually silent when the temperature falls below 55°F. What is a possible practical domain for the snowy tree cricket function?
Domain: 55 to 100 degrees
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Determine the average rate of change of the number of chirps per minute with respect to temperature as the temperature increases from 55°F to 60°F.
Average = (80-60)/(60-55) = 20/5 = 4 chirps per degree
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How does the average rate of change determined in part b compare with the average rate of change as the temperature increases from 65°F to 80°F
Average = (160-100)/(80-65) = 60/15 = 4 chirps per degree
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Cheers,
Stan H.</PRE>