Find the Unexplained Variation for the Paired Data $y = 3 x$

Multiple Choice

Find the unexplained variation for the paired data. The equation of the regression line for the paired data below is $y = 3 x$ .
$\begin{array}{c|cccc}x & 2 & 4 & 5 & 6 \\\hline y & 7 & 11 & 13 & 20\end{array}$

A) $88.75$
B) $78.75$
C) $14.25$
D) $10.00$