Consider the following table of data.

$\backslash$table$[[x,1,1,2,2,10],[y,1,3,1,3,10]]$

a$.$ Calculate the least squares line and the correlation coefficient.

b$.$ Repeat part $($a$),$ but this time delete the last point.

c$.$ Draw a graph of the data, and use it to explain the dramatic difference between the answers to parts $($a$)$ and $($b$).$

a$.$ The least squares line is $Y=($Use integers or decimals for any numbers in the equation. Round to four decimal places as needed.$)$