Asked by Riley

If you were given a graph of a function instead of its equation, explain how to find the average rate of change between two points. How does this differ from finding the instantaneous rate of change? Please use a diagram to help you explain.
Answered by oobleck
it is the slope of the line joining the points. Recall that on the interval [a,b] that is

((f(b) - f(a)) / (b-a)

I'm sure your calculus text has illustrations and explanations.
I know google does.
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