Answer:
A and B
Step-by-step explanation:
Hello There!
In order for a relationship to be proportional it has to have a constant rate of change and it has to go through the origin (0,0)
Right off the bat we can eliminate C and D because they don't go through the origin
The first answer choice goes through the origin and has a constant rate of change of 9 so A does represent a proportional relationship
The second answer choice also foes through the origin and has a constant rate of change of 21/3 or 7 so B also represents a proportional relationship
