Answer:
initial amount: 40 thousand gallons
final amount: 20 thousand gallons
Step-by-step explanation:
To find the initial amount, look at the place on the graph where the line touches the y-axis and x=0. On the graph, this is (0,40), meaning 40 thousand gallons.
To find the final amount, find where the line ends. The line ends at (5,20), meaning 20 thousand gallons.
