Is (-6, 5), (-5, 6), (8, 2) a function or not a function?

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 ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?