HELP Joe purchased a laptop that regularly sold for $1,350 but was on sale for 15% off. He had
to pay 7% tax. He decided to buy it on an installment plan and had to pay 20% of the total
cost including tax as a down payment. Joe paid $90 for 12 months.
a. What was the total cost of the laptop after the discount and including tax?
$1,227.83
b. What was the down payment?
$245.57
What was the total of Joe's MONTHLY payments?
$1080.00
d. What was the finance charge?
$97.74

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.