Ch. 2 - Functions and Graphs

Blitzer8th EditionCollege AlgebraISBN: 9780136970514Not the one you use?Change textbook

Blitzer 8th Edition

Ch. 2 - Functions and Graphs

Problem 20

Chapter 3, Problem 20

Use the graph of y = f(x) to graph each function g. g(x) = f(x+1)

Verified step by step guidance

Step 1: Understand the transformation represented by g(x) = f(x+1). This equation indicates a horizontal shift of the graph of f(x). Specifically, adding 1 inside the parentheses shifts the graph to the left by 1 unit.

Step 2: Identify key points on the graph of y = f(x). These key points might include the x-intercepts, y-intercepts, and any other notable points such as vertices or turning points.

Step 3: Apply the horizontal shift to each key point. For each point (x, y) on the graph of f(x), subtract 1 from the x-coordinate to find the corresponding point on the graph of g(x). The new point will be (x-1, y).

Step 4: Redraw the graph using the shifted points. Plot the new points on the coordinate plane and ensure the shape of the graph remains consistent with the original graph of f(x).

Step 5: Verify the transformation. Check that the graph of g(x) = f(x+1) is indeed shifted 1 unit to the left compared to the graph of f(x). Ensure all points and features of the graph are correctly adjusted.

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Key Concepts

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

Function Transformation

Function transformation refers to the changes made to the graph of a function based on modifications to its equation. In this case, g(x) = f(x + 1) represents a horizontal shift of the function f(x) to the left by 1 unit. Understanding how transformations affect the graph is crucial for accurately sketching the new function.

Horizontal Shifts

Horizontal shifts occur when the input variable of a function is altered by adding or subtracting a constant. For g(x) = f(x + 1), the '+1' indicates that every point on the graph of f(x) moves left by 1 unit. This concept is essential for predicting how the graph of g will relate to the original function f.

Graph Interpretation

Graph interpretation involves analyzing the visual representation of a function to understand its behavior and characteristics. By examining the graph of y = f(x), one can identify key features such as intercepts, maxima, and minima, which will help in accurately plotting g(x) after applying the transformation.

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