# To graph: the function f ( x ) = − 5 x using the graph of a standard function and then applying transformations.

### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

#### Solutions

Chapter 2.5, Problem 34E
To determine

## To graph: the function f(x)=−5x using the graph of a standard function and then applying transformations.

Expert Solution

### Explanation of Solution

Given information:

the function is f(x)=5x

Graph:

To plot the graph of f(x)=x ,use the plotting points method, substitute different value of x on f(x)=x to determine corresponding value of f(x) .

The table is thus obtained as:

 x 0 1 4 9 y 0 1 2 3

now plot each point of x along the horizontal axis and the corresponding value of f(x)=y along vertical axis and connect each point to form a smooth curve.

The graph of f(x)=x is obtained as:

Now, the graph of f(x)=5x is the graph of f(x)=x reflectedin the x -axis and stretched vertically by a factor of 5 .

The graphof f(x)=5x is obtained as:

Interpretation:

From the above graph it can be obtained that the graph of f(x)=5x is obtained by reflectingthe graph of f(x)=x in the x -axis, then stretching vertically by a factor 5 .

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