The graph below shows Sarah’s earnings compared to her savings. Determine the constant of proportionality. A. 1/5 B. 2 C. 5 D.10

Answer:
Answer is 5
Step-by-step explanation:
When you compare the two you get the following below,
2 to 10
4 to 20
6 to 30
8 to 40
Notice how each mutiplies by 5? Therefore, the answer is 5!