3/8 is the unit rate/rate of change or 0.375 hours per container.
Step-by-step explanation:
This is a simple problem, all you need to do is take a interval such as (16,6) take the y value and divide it by the x value. So, 6/16 is 3/8 or 0.375. You can do this with all the point intervals on the graph and you will get the same answer 3/8 or 0.375 since the graph is linear.
