3- 2- 1- ++X -5 4-3-2 -1 N 2 3 -2- -3 4)

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter1: Introduction To Algebra
Section1.5: Translating Sentences Into Equations
Problem 2MRE
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Question

Use the graph to determine
a. intervals on which the function is increasing, if any.
b. intervals on which the function is decreasing, if any.
c. intervals on which the function is constant, if any.

3-
2-
1-
++X
-5 4-3-2 -1
N 2 3
-2-
-3
4)
Transcribed Image Text:3- 2- 1- ++X -5 4-3-2 -1 N 2 3 -2- -3 4)
Expert Solution
Step 1

Given graph:

Constant function:

 A function is constant on an interval if for any x1 and x2 in the interval, fx1=fx2.

Increasing function: 

 A function is increasing on an interval if for any x1 and x2 in the interval, where x1<x2 , then fx1<fx2.

Decreasing function: 

 A function is decreasing on an interval if for any x1 and x2 in the interval, where x1<x2 , then fx1>fx2.

 

 

Step 2

From the given figure:

Interval -,-4

Suppose x1=-5   and   x2=-6

f-5=2f-6=2f-5=f-6Constant function

Interval -4,0

Suppose x1=-3   and   x2=-1

-3<-1f-3>f-1Decreasing function

Interval 0,2

Suppose x1=0  and   x2=1

0<1f0>f1Decreasing function

Interval 2,

Suppose x1=3   and   x2=4

f3=-2f4=-2f3=f4Constant function

 

 

 

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