Answer:
C
Step-by-step explanation:
If you look on the axis you can solve the problem
3
its 3 because the line goes through 3 on x axis of the graph
13) 32/400
14) 51/200
15) 341/400
16) 1/6
17) 339/800
18) 479/600
19) 61%
20) 43%
21) 29%