Mathematics, 08.11.2019 04:31 donbright100

The graph shows the relationship between the total cost and the number of gift cards that raj bought for raffle prizes.

a graph titled cost of gift cards. the x-axis shows the number of gift cards, numbered 1 to 9, and the y-axis shows the total cost in dollars, numbered 10 to 90. blue diamonds appear at points (1, 20), (2, 40), (3, 60), (4, 80).
what would be the cost for 5 of the gift cards?

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The graph shows the relationship between the total cost and the number of gift cards that raj bought...