Xy=2 direct variation

Let r = 3. what is the value of r + 58?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Do, h = (7, 9) (14, 18) the scale factor is