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October 22, 2014

October 22, 2014

Posted by **Shaila** on Sunday, September 26, 2010 at 3:02am.

b) Describe a graph which the average rate of change between two points is equal to the instantaneous rate of change at:

i) one of the two points

ii) the midpoint between two points

c) Describe a real life situation that could be represented by each of the graphs in part b)

- Math - Instantaneous and average rates of change -
**MathMate**, Sunday, September 26, 2010 at 2:43pma)

The equivalent statement is that:

since the instantaneous rate of change is equal to the average rate of change throughout the domain, the instantaneous rate of change does*not*vary.

How would you describe a function for which the instantaneous rate of change does not vary?

b)

The mid-point theorem in mathematics says that the average rate of change of a function between two points is equal to the instantaneous rate of change of at least one point between the two end-points. Therefore the graph of any curve would satisfy condition (b)(i).

For part b)(ii), you need to draw a graph in which the tangent to the curve at the mid-point is equal the chord joining the two end-points.

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