The temperature in degrees Fahrenheit can be estimated from the number of cricket chirps per minute. If a cricket chirps 40 times per minute, the temperature is approximately 50 degrees Fahrenheit.
The average rate of change in temperature is 0.25 degree per chirp per minute. Use these facts to estimate
The temperature when a cricket chirps 51 times per minute.
A) 52.75 degrees
B) 78 degrees
C) 40.25 degrees
D) none of the above

Question

Quizplus · Accepted Answer

Using the given rate of change of 0.25 degree per chirp per minute, we can estimate that for every additional 11 chirps (51 minus 40), the temperature increases by 0.25 x 11 = 2.75 degrees Fahrenheit. Starting from the initial temperature of 50 degrees Fahrenheit, the estimated temperature when a cricket chirps 51 times per minute is 50 + 2.75 = 52.75 degrees Fahrenheit. Therefore, the best choice is A.

The Temperature in Degrees Fahrenheit Can Be Estimated from the Number