The Common Cricket Can Be Used as a Crude Thermometer

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