Which relationship between x and y in the equation shows a proportional relationship?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?