The Common Cricket Can Be Used as a Crude Thermometer

question 23

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.
$\begin{array} { c c } \hline \begin{array} { c } \text { Chirp Rate } \\\text { (chirps/second) }\end{array} & \begin{array} { c } \text { Temperature } \\\left( { } ^ { \circ } \mathrm { F } \right) \end{array} \\\hline 2.8 & 70.5 \\1.7 & 54.7 \\3.3 & 71.6 \\2.7 & 69 \\2.3 & 54.1 \\3.4 & 73.1 \\\hline\end{array}$
The least-squares regression line for predicting the temperature from the chirp rate is y = 32.298 + 12.297x.If two chirp rates differ by 1.5 chirps per second, by how much would the temperature differ?

• A) 48 ºF
• B) 17 ºF
• C) 18 ºF
• D) 21 ºF

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Definitions:

Marginal Revenue

The increased income from the sale of one more unit of a product or service.

Burritos

A type of Mexican food consisting of a wheat flour tortilla wrapped or folded into a cylindrical shape to fully enclose the filling.

Marginal Revenue

The additional income earned from selling one more unit of a good or service; it's the change in total revenue divided by the change in the quantity sold.

Burritos

A type of Mexican and Tex-Mex cuisine that consists of a wheat flour tortilla wrapped or folded into a cylindrical shape to completely enclose a filling.