Does the line of best fit provide useful information about every pair of data sets? Why or why not? Your answer should probably mention the correlation coefficient.

You can run 4 laps in 10 minutes your friend can run 6 laps in 15 minutes. are these rates proportional

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?