The Equation of the Regression Line for the Paired Data $\hat { y } = 3 x$

Multiple Choice

The equation of the regression line for the paired data below is $\hat { y } = 3 x$ . Find the standard error of estimate.
$\begin{array}{r|rrrr}\mathrm{x} & 2 & 4 & 5 & 6 \\\hline \mathrm{y} & 7 & 11 & 13 & 20\end{array}$

A) $2.2361$
B) $4.1892$
C) $5.00$
D) $6.2750$