Skip to main content
Ch. 1 - Functions
Briggs - Calculus: Early Transcendentals 3rd Edition
Briggs3rd EditionCalculus: Early TranscendentalsISBN: 9780136847243Not the one you use?Change textbook
All textbooksBriggs 3rd EditionCh. 1 - FunctionsProblem 11
Chapter 1, Problem 11

How do you obtain the graph of y=f(3x)y=f\(\left\)(3x\(\right\)) from the graph of y=f(x)y=f\(\left\)(x\(\right\))?

Verified step by step guidance
1
Start by understanding the transformation involved. The function y = f(3x) represents a horizontal compression of the graph of y = f(x).
Recall that multiplying the input of a function by a constant greater than 1 compresses the graph horizontally. In this case, the factor is 3.
To visualize this, consider any point (a, b) on the graph of y = f(x). For the graph of y = f(3x), this point will be transformed to (a/3, b).
This means that every x-coordinate on the graph of y = f(x) is divided by 3 to obtain the corresponding x-coordinate on the graph of y = f(3x).
Finally, sketch the new graph by applying this transformation to key points and features of the original graph, such as intercepts and turning points, to see the compressed version.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
8m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Function Transformation

Function transformation refers to the process of altering the graph of a function through various operations, such as shifting, stretching, or compressing. In this case, the transformation involves replacing the input variable 'x' with '3x', which compresses the graph horizontally by a factor of 3. Understanding how these transformations affect the graph is crucial for accurately sketching the new function.
Recommended video:
5:25
Intro to Transformations

Horizontal Compression

Horizontal compression occurs when the input of a function is multiplied by a factor greater than 1, resulting in the graph being 'squeezed' towards the y-axis. For the function y = f(3x), the factor of 3 compresses the graph horizontally, meaning that points on the original graph will be closer together on the new graph. This concept is essential for predicting how the shape of the graph changes.
Recommended video:
5:28
Horizontal Parabolas

Graphing Techniques

Graphing techniques involve methods used to accurately represent functions visually. This includes understanding the original function's key features, such as intercepts and asymptotes, and applying transformations systematically. By mastering these techniques, one can effectively sketch the transformed graph of y = f(3x) based on the original graph of y = f(x).
Recommended video:
06:15
Graphing The Derivative
Related Practice
Textbook Question

If ƒ(x) = √x and g(x) = x³-2 and , simplify the expressions (ƒ o g) (3), (ƒ o ƒ) (64), (g o ƒ) (x) and (ƒ o g) (x)

1
views
Textbook Question

The parabola y=x²+1 consists of two one-to-one functions, g₁(x) and g₂(x). Complete each exercise and confirm that your answers are consistent with the graphs displayed in the figure. <IMAGE>


Find formulas for g₁((x) and g₁⁻¹(x). State the domain and range of each function.

1
views
Textbook Question

Evaluating functions from graphs Assume ƒ is an odd function and that both ƒ and g are one-to-one. Use the (incomplete) graph of ƒ and g the graph of to find the following function values. <IMAGE>


ƒ(g(4))

1
views
Textbook Question

Find functions ƒand g such that ƒ(g(x)) = (x² +1)⁵ . Find a different pair of functions ƒ and g that also satisfy ƒ(g(x)) = (x² +1)⁵  

Textbook Question

How do you obtain the graph of y=f(x+2)y=f\(\left\)(x+2\(\right\)) from the graph of y=f(x)y=f\(\left\)(x\(\right\))?

1
views
Textbook Question

Solve the equation sin 2Θ = 1, for 0 ≤ Θ < 2π .