2010018105

The values of variables $x$ and $y$ are listed in the following table and visualized in the next graph. Calculate the correlation coefficient of $x$ and $y$ and round it to four decimal places. $$\begin{array}{|cccccc|}\hline x& 1& 2& 3& 4& 4.5\\ y& 6& 4& 5& 3& 3.5\\ \hline\end{array}$$