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Ch. 2 - Functions and Graphs
Blitzer - College Algebra 8th Edition
Blitzer8th EditionCollege AlgebraISBN: 9780136970514Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBlitzer 8th EditionCh. 2 - Functions and GraphsProblema 24
Capitolo 3, Problema 24

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

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Step 1: Understand the transformation represented by g(x) = f(-x). This transformation reflects the graph of the original function y = f(x) across the y-axis. For every point (x, y) on the graph of f(x), the corresponding point on g(x) will be (-x, y).
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 reflection transformation to each key point. For each point (x, y) on the graph of f(x), replace x with -x to find the corresponding point on g(x). For example, if a key point is (2, 3), the reflected point will be (-2, 3).
Step 4: Plot the reflected points on the graph. Ensure that you maintain the same y-coordinate for each point while flipping the x-coordinate to its opposite sign.
Step 5: Connect the reflected points smoothly to form the graph of g(x). Ensure that the overall shape of the graph matches the reflection of the original graph across the y-axis.

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Function Reflection

The function g(x) = f(-x) represents a reflection of the function f(x) across the y-axis. This means that for every point (a, b) on the graph of f, there will be a corresponding point (-a, b) on the graph of g. Understanding this concept is crucial for accurately transforming the graph of f into g.
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Reflections of Functions

Graphing Techniques

Graphing techniques involve methods for accurately plotting functions on a coordinate plane. This includes understanding how to manipulate the coordinates of points based on transformations such as reflections, translations, and stretches. Mastery of these techniques allows for effective visualization of how changes in the function's equation affect its graph.
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Graphs and Coordinates - Example

Coordinate System

The coordinate system is a two-dimensional plane defined by an x-axis (horizontal) and a y-axis (vertical). Each point on this plane is represented by an ordered pair (x, y). Familiarity with the coordinate system is essential for interpreting and graphing functions, as it provides the framework for understanding the position and behavior of graphs.
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Graphs & the Rectangular Coordinate System
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