Answer:
2 inches
Step-by-step explanation
Check attachment for diagram.
According to the graph given, it can be seen that the x axis is the time axis and the y axis is the total rainfall.
To determine the total rainfall amount after 3 hours, we will have to locate time at 3hours on the x axis and trace it up to the straight line, then trace it perpendicular to the y axis to know the total rainfall at t = 3.
Based on the diagram, The total rainfall after 3hours is 2inches.