Which point is not on the graph of the function y = 3x?

(0, 0)
(5, 15)
(9, 3)
(7, 21)

If 25% of y is 30, what is 60% of y?

Me. i can't figure out this question. give an explanation too. .

The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.