Mathematics, 23.12.2019 14:31 mermer11

Under plan a, a 1min call cost 0.54 dollars and a 4 min call cost 1.08 . under b the cost for x minutes is given by y=0.289x. which plan is cheaper and why

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Under plan a, a 1min call cost 0.54 dollars and a 4 min call cost 1.08 . under b the cost for x minu...