Question

A store sells notebooks for $3 each and does not charge sales tax. If x represents the number of notebooks Adele buys and y represents the total cost of the notebooks she buys, which best describes the values of x and y?

Answer 1

Answer: The value of x can be any integer greater than or equal to 0, and y will be an integer greater than or equal to 0.

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Answer 2

The values of X and y can be expressed as an equation thus y(x) = 3x

x = number of books purchased

y = total cost of purchase

Cost per notebook = $3

The total cost y can be represented as a function of x thus;

y = cost per notebook × Number of notebooks purchased

y(x) = 3x

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