i think it's 20 but i'm not that sure
Answer:
7/5
Step-by-step explanation:
To determine the proportionality you'll have to multiply the answers by x to get y. In this case 7/5 is the answer.
Calculations
0 x 7/5 = 0
20 x 7/5 = 28
40 x 7/5 = 56
