I will give you brainliest if you give me the correct answer

Answer:
30 m/s
Explanation:
if you look at the graph and you start at the notch in between 20 and 10, and go over 1 (making sure to go over a full second so you land on an inbetween gray line) you go up 30. so its 30 m/s.
i hope this helps :))