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Save You More offers a buy one/get one free item each week. Customers who purchase only one of the item must pay the regular price. The limit is one deal per customer. Is the relation (# sale items purchased, price) a function? Why or why not?
a function is for every input, you get 1 output so sale items purchased to cost if bought 1 then paid c (original cost) if bought 2 then paid c ( buy 1 get one)
so it is a functinon because it is only not a function if bought x and pay y or z, can only be 1
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