't'l' 'l'l tartu) w i'd'St;'peI nu li"; "oi 82. a. Using "size" as the independent variable and "cost" as the dependent variable, draw a scatter plot. b. Does it appear from inspection that there is a relationship between the variables? Why or why not? C. Calculate the least-squares line. Put the equation in the form of: fi = a +-le d. Find the correlation coefficient. Is it significant? e. if the laundry detergent were sold in a 40-ounce size, find thel'estimated cost. i. if the laundry detergent were sold in a 90-ounce size, find the estimated cost. Q. Does it appear that a line is the best way to fit the data? Why or why not? 726 Chapter 12 1 Linear Regresoion and Genuilarun 47 iclcudfic Mine: cazrnrprcdcm: 'rnedia "document: lntrctl JCtC r't "SlBIi'CE'Cp.pf