Data in the following table list the average weekly earnings of U.S. production workers from 2003 to 2013. 

a) Without using the regression feature on a graphing calculator, model the data with a linear function. Then using this function, predict the average weekly earnings of U.S. production workers in 2017. Answers may vary depending on the data points used. 

b) Using a graphing calculator, fit a regression line to the data and use it to predict the average weekly earnings of production workers in 2017. What is the correlation coefficient for the regression line?

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Year, x 2003, 0 2005, 2 2007, 4 2009. 6 2011, 8 2013, 10 Average Weekly Earnings of U.S. Production Workers $517.82 544.05 589.27 616.01 653.19 677.67