A store sells books for $12 each. In the proportional relationship between x, the number of books purchased, and y, the cost per books in dollars” to “y, the total cost of the books in dollars, the constant of proportionality is 12. Which equation shows the relationship between x and y? A: y = 12 - x

B: y = 12x

C: y = 12 + x

D: y = x under 12

P. S: 12/x to be exact

B

Step-by-step explanation:

we know it has to equal y(the total cost of books). We also know that each book is 12 dollars each. So 12 dollars per book =12x. We add in the y now,

y=12x  

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

the answer would be 44.79

plz mark brainliest

step-by-step explanation: