Given the x and y coordinates(listed below) of a scatter plot, what is the r?
\begin{verbatim}
x | y
5 1
9 3
4 7
5 1
13 7
\end{verbatim}

Carlos Rodriguez <carlos@math.albany.edu>
This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
Last modified: Wed May 13 12:29:11 EDT 1998