Tony has a barrel to catch rainwater to use for household chores. The graph shows the volume of water in the barrel during a rainstorm.
a. At one point Tony took water out of the barrel to wash the dishes. When he do that?
b. Approximately how many liters of water did he take out? (1 point)
6:00 p.m.; 0.8 liter
3:30 p.m.; 0.9 liter
5:00 p.m.; 0.8 liter
5:30 p.m.; 0.2 liter