Tom just received a credit card with an introductory apr of 0% for nine months and a credit limit of $500. the apr for purchases after the introductory period is 19.9%. the penalty apr is 24.9% and the apr for cash advances is 20.4%. tom uses his card at the mall and spends $360. if tom wants to have a balance of $0 before his introductory period expires, what monthly payments should he make?

Use a calculator to verify that σ(x) = 62, σ(x2) = 1034, σ(y) = 644, σ(y2) = 93,438, and σ(x y) = 9,622. compute r. (enter a number. round your answer to three decimal places.) as x increases from 3 to 22 months, does the value of r imply that y should tend to increase or decrease? explain your answer. given our value of r, y should tend to increase as x increases. given our value of r, we can not draw any conclusions for the behavior of y as x increases. given our value of r, y should tend to remain constant as x increases. given our value of r, y should tend to decrease as x increases.