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23 September, 16:21

Mark bought gifts for his friends, and each gift cost $9. Let y represent the total cost and x represent the number of gifts. Write an equation to represent the proportional relationship between the total cost and the number of gifts he bought?

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  1. 23 September, 16:37
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    Lets say he has 5 friends

    1,9

    2,18

    3,27

    4,36

    5,45

    Mark will spend 45 dollars on gifts
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