Suppose y varies directly as x and y = 21 an x=3 find x when y=42

What is the least common multiple of 16 and 3?

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?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?