# The graph of the derivative function M ' ( t ) and which year has negative derivative.

### Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

### Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

#### Solutions

Chapter 2.7, Problem 13E
To determine

## To sketch:The graph of the derivative function M'(t) and which year has negative derivative.

Expert Solution

Between 1960 and 1965/1966.

### Explanation of Solution

Given:The graph shows the average age of first marriage of Japanese men varied in the last half of the 20th centaury.

It is given that the graph which shows the average age of first marriage of Japanese men varies.

Graph of the derivative function M'(t) in that year derivative is negative is given below

Therefore, the exact years in which the derivative is negative, it’s between 1960 and 1965/1966.

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