10. A tractor costs $13,650 and depreciates in value by 14% per year. How much will the tractor be worth after 10 years?
a $2,597.86 b. $13,510.00 c. $3,020.77 d. $50,603.57

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%