   Chapter 8.7, Problem 70E

Chapter
Section
Textbook Problem

HOW DO YOU SEE IT? Use the graph of f’ shown in the figure to answer the following. (a) Approximate the slope of f at x = − 1 . Explain.(b) Approximate any open intervals on which the graph of f is increasing and any open intervals on which it is decreasing. Explain.

(a)

To determine
The slope of function f at x=1.

Explanation

Given:

The graph of f(x):

Explanation:

As, f(x1) represents the slope of the function f(x) at x=x1 therefore, the slope of the function f(x) at

(b)

To determine
The open intervals on which the graph of f is increasing and decreasing.

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