The answer is C. y = 2.5x + 3
If customers have to pay $2.50 per pound then x is the amount of pounds they actually buy. Additionally to all of this $3 is a side fee that had to be paid when they originally came into the farm.
The reason it’s not the others ones is because of the parenthesis. The parenthesis indicates that you need to multiply what’s outside the parenthesis by everything that’s inside the parenthesis making C the answer.
hope this helps !