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4th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781337687805

Chapter 2.6, Problem 42E

To determine

**To estimate:** The rate of change of the temperature after an hour.

Expert Solution

The rate of change of the temperature after an hour is approximately is

**Result used:**

The slope of the line passing through the points

**Calculation:**

From the graph, the points are

Obtain the slope of the tangent line.

Use the slope formula stated above and compute the slope of the line passing through the points

Thus, the slope of the tangent line is

Therefore, the rate of change of the temperature after an hour is approximately