The table shows the cost of grapes based on the number of pounds purchased.
Pounds Cost
3 $3.69
5 $6.15
8 $9.84

What is the constant of proportionality in the relationship

The manager at gabriela's furniture store is trying to figure out how much to charge for a book shelf that just arrived. the book shelf was bought at a wholesale price of $ 1 4 7 . 0 0 $147.00, and gabriela's furniture store marks up all furniture by 6 0 % 60%. at what price should the manager sell the book shelf?