Chapter 2.8, Problem 15E

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8th Edition

James Stewart

ISBN: 9781305270343

Textbook Problem

The graph shows how the average age of first marriage of Japanese men varied in the last half of the 20th century. Sketch the graph of the derivative function *M'*(*t*). During which years was the derivative negative?

To determine

**To sketch:** The graph of

Explanation

**Given:**

The given graph highlights the variation of the average age of first marriage of Japanese men varied in the last half of the 20th century.

**Calculation:**

From the graph, it is clear that the slope of the graph is positive initially.

The graph has horizontal tangent just after

After

After

This implies that, the derivative graph will positive initially with functional value zero just after

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