Please see the picture attached for the question. I really need help, Idk what I’m doing wrong with figuring this out

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Which of these tables represents a non-linear function?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?