A regression was run to determine if there is a relationship between hours of study per week (x) and the final exam scores (y). The results of the regression were: y=ax+b a=5.66 b=35.68 r²=0.461041 r=0.679 Use this to predict the final exam score of a student who studies 3 hours per week, and please round your answer to a whole number.

Explain how to interpret the absolute value of acorrelation coefficient.

DVD Player sales The table shows the number of DVD play-ers sold in a small electronics store in the years 2003-2013. What was the average rate of change of sales between 2003 and 2013? Whatwas the average rate of change of sales between 2003 and 2004? What was the average rate of change of sales between 2004 and 2005? Between which two successive years did DVD player sales increase most quickly?

For the following exercises, draw a best-fit line for the plotted data.