Mathematics, 29.07.2019 14:30, daijafoster0

Three friends bought 4, 6, and 8 books. the table shows the cost of the books. number of books 4 6 8 cost ($) 30 45 60 what is the constant of proportionality?

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Three friends bought 4, 6, and 8 books. the table shows the cost of the books. number of books 4 6 8...