The Paired Data Below Consists of Test Scores and Hours $\hat { y } = 44.8447 + 3.52427 x$

Multiple Choice

The paired data below consists of test scores and hours of preparation for 5 randomly selected students. The equation of the regression line is $\hat { y } = 44.8447 + 3.52427 x$ . Find the total variation.
$\begin{array}{c|rrrrr}\mathrm{x} \text { Hours of preparation } & 5 & 2 & 9 & 6 & 10 \\\hline \mathrm{y} \text { Test score } & 64 & 48 & 72 & 73 & 80\end{array}$

A) $599.2$
B) $87.4757$
C) $498.103$
D) $511.724$