The following table shows the payroll for 10 major league baseball teams (in millions) for the 2002 season, along with the number of wins for that year.

Payroll	Wins	Payroll	Wins
$171	103	$56	62
$108	75	$62	84
$119	92	$43	78
$43	55	$57	73
$58	56	$75	67

1. Calculate the correlation coefficient. Test to see whether the correlation coefficient is not equal to 0 at =0.05.
2. What is the regression line that best fits the data?
3. What is the predicted number of wins with a $70 million payroll?
4. What percentage of the variation in wins is explained by the payroll?