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4th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781337687805

Chapter 2, Problem 40RE

To determine

**To Identify:** The curves

Expert Solution

In the given graph,

**Graph:**

The given graph is shown as in Figure 1,

**Observation:**

From the Figure 1, it is observed that the point

Recall that the derivative of a function is zero where the function has a horizontal tangent.

Therefore,

Observe the graph of *a* and *c* carefully.

The slope of the curve is positive for *c* is the only curve which is positive or

Therefore,

Use the above information

Thus,