If the formula $ r=\frac{1}{n-1} \sum_{i=1}^{n}\left(\frac{x_{j}-\bar{x}}{s_{x}}\right)\left(\frac{y_{j}-\bar{y}}{s_{y}}\right) $ were used to find the -value of the following data, what would be the value of $ \bar{y} $ ?
\begin{tabular}{|c|c|}
\hline$ x $ & $ y $ \
\hline 1 & 3 \
\hline 2 & 7 \
\hline 3 & 8 \
\hline 4 & 11 \
\hline 5 & 16 \
\hline
\end{tabular}
A. 3
B. 5
C. 9
D. 7

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