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The cost of printing cookbooks is $2.09 per book plus a one time setup fee of $349. All taxes are included. Which of the following functions models a(x) the average cost per book of printing x books

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carlosego
For this case we have the following variable:
 x = number of books
 We write a function of the form:
 y = mx + b
 Where,
 m = 2.09 $ / book
 b = 349 $
 Substituting values:
 a (x) = 2.09x + 349
 Answer:
 A function that models a (x) the average cost per book of printing x books is:
 a (x) = 2.09x + 349

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