### Concept (1)

The average rate of change of a population is the total change divided by the time taken for that change to occur. The average rate of change can be calculated with only the times and populations at the beginning and end of the period. Calculating the average rate of change is similar to calculating the average velocity of an object, but is different from calculating the instantaneous rate of change.

### Sample Problems (3)

Need help with "Average Rate of Change" problems? Watch expert teachers solve similar problems to develop your skills.

###### Problem 1
How to compute the average rate of change of the amount of liquid in a tank over an interval of time, and how to represent this average rate on a graph.
###### Problem 2
How to compute the average rate of change of the amount of a drug in a patient's bloodstream over an interval of time, and how to interpret whether the amount is increasing or decreasing over time.
###### Problem 3
How to determine negative or positive average rate of change for certain time intervals, and how to compute average rate of change from a graph.
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