Respuesta :

Answer:

I believe it is C. y = 12 - x

Step-by-step explanation:

I remember doing this in 8th grade. it is a little fuzzy but I am pretty sure that is the correct answer.

i think the answer is B-y=12x. if 12 represents the cost, and x represents the number of books then you multiply them to get the total, hence the relationship
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