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12 August, 15:52

The discount on an item is directly proportional to the original price of an item. The discount of a $64 item is $16. Which graph represents this direct-variation relationship?

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  1. 12 August, 18:55
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    Direct variation means y=kx so

    16=64k, k=16/64=1/4

    d (p) = x/4 (the discount as a function of the original price)
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