10 A random sample of 5 pairs of values \(( x , y )\) is given in the following table.
- Find, showing all necessary working, the equation of the regression line of \(y\) on \(x\).
- Find, showing all necessary working, the value of the product moment correlation coefficient for this sample.
- Test, at the \(10 \%\) significance level, whether there is evidence of non-zero correlation between the variables.