(a) Use a graphing calculator to fit a regression line to the data in Exercise 66.
In Exercise 66
Year, x Credit-Card Debt
Per Household, y
1992, 0 .............................................. $ 3,803
1996, 0 ........................................ 6,912
2000, 8 ........................................ 8,308
2004, 12 ........................................ 9,577
2008, 16 ........................................ 10,691
2011, 19 ........................................ 14,750
(b) Estimate average credit-card debt per U.S. house hold in 2014 and compare the result with the estimate found with the model in Exercise 66.
(c) Find the correlation coefficient for the regression line and determine whether the line fits the data closely.