Given: Overnight, a pipe cracked and started to leak into the basement; the graph shows the depth of the water about the time
Required: To find out how many inches the water rises each hour, how deep the water is after 4 hours, and how long it will take for the water to reach a depth of 80 inches.
Explanation: The depth of the water is shown on the y-axis of the graph, while the time is shown on the x-axis. Now, after 1 hour, the line on the graph is at 10 inches.
Now, after 4 hours, the graph reaches y=40. Hence after 4 hours, the water is 40 inches.
Finally, since the graph is linear, the water will reach 80 inches after 8 hours.
Final Answer: a) 10 inches
b) 40 inches
c) 8 hours
