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The Common Cricket Can Be Used as a Crude ThermometerThe Least-Squares Regression Line for Predicting the Temperature from the the Colder

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Question 19
Multiple Choice
arrowQuestion 19arrow
Multiple Choice

The common cricket can be used as a crude thermometer. The colder the temperature, the slower the rate of chirping. The table below shows the average chirp rate of a cricket at various temperatures
 Chirp Rate  (chirps/second)  Temperature (F)2.961.42.055.53.877.52.558.81.753.41.652.6\begin{array}{cc}\hline \begin{array}{c}\text { Chirp Rate } \\\text { (chirps/second) }\end{array} & \begin{array}{c}\text { Temperature } \\\left({ }^{\circ} \mathrm{F}\right)\end{array} \\\hline 2.9 & 61.4 \\2.0 & 55.5 \\3.8 & 77.5 \\2.5 & 58.8 \\1.7 & 53.4 \\1.6 & 52.6 \\\hline\end{array}
The least-squares regression line for predicting the temperature from the chirp rate is y=34.0812+10.6698xy = 34.0812 + 10.6698 x . Predict the temperature if the chirp rate is 3.63.6 chirps per second.


A) 75F75 ^ { \circ } \mathrm { F }
B) 72F72 { } ^ { \circ } \mathrm { F }
C) 38F38 ^ { \circ } \mathrm { F }
D) 76F76 ^ { \circ } \mathrm { F }

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