13) Which graph represents a non-proportional relationship?

Answer:
B
Step-by-step explanation:
Proportional relationships go through the origin (0,0) and have a constant rate of change.
Regarding proportional relationships, when graphed the line should be straight and go through the origin (0,0)
All graphs appear to have straight lines.
However graph B has a line that doesn't go through the origin, therefore B represents a non proportional relationship