Answer
In MINITAB, enter the x values in C1 and in C2 enter the y values (with the additional data point).
Select Stats -> Basic Statistics -> Correlation
In "Variables" enter C1 C2.
You may deselect "Display p-values".
The correlation between x and y will be given.
$r=0.860$
Work Step by Step
Notice that the addition of this new point causes the older points to become "closer" in the new scatter diagram.
