Roberto makes cakes. the number of cups of flour he uses is proportional to the number of cakes he makes. roberto uses 22 1/2 cups of flour to make 10 cakes. which equation represents the relationship between x, the number of cups of flour roberto uses, and y, the number of cakes he makes? a f = 49c question 8 options: y=214x y = 2 1 4 x y=49x y = 4 9 x y=212 x y = 2 1 2 x y=10x