Answer:
The third graph.
Step-by-step explanation:
Before practice, the jug was empty. Â This means it starts at 0. Â Ray fills the jug up; this will be the graph increasing, starting at 0, until the jug was filled.
The jug stays at the same level during practice; this means the graph will be constant during this time.
Halfway through practice the players drink from the jug. Â During this time the graph will be decreasing.
Ray then fills the jug back up; this means the graph will increase.
During the rest of practice, the jug stays at the same level; the graph will be constant during this time.
After practice Ray drains the jug. Â This means the graph will decrease during this time.