If the price of peanut butter for peanut butter and jelly sandwiches increases, the supply for PB&J sandwiches will ?
I know the answer is decrease but can someone explain to me why it’s decrease instead of increase ?

decrease

Explanation:

It will decrease because when the price goes up it will make people not want to buy it because they used to be able to buy it for cheaper.  For example if a soda was $1.99 and they then raised the price to $3.00 would you want to buy it as much? No, probably not unless you were truly thirsty but even still if someone raised the price and there was a cheaper option you would go with the cheaper option because it's the same thing but differently priced. People tend to buy things when they are cheaper or on sale rather than at their original price and that's why some stores use pricing to trick you. They say something is on sale but in reality it costs just the same as the original price or sometimes more than that. They do this to compete and to get money out of you.

answer; i believe the correct answer is (180)