Sales = 13. 89(Advertising Investment) + 28. 65 with a correlation coefficient of r = 0. 89 What would you expect my Sales be if I I invest $1000 in advertising? Am I guaranteed that amount of money in Sales? Why or why not? If not, do you expect it to be close? Would you recommend I invest this money and use this agency based on this predictive model? Thank you for your help!
