Textbook Question
In Exercises 11–26, determine whether each equation defines y as a function of x. x + y = 16
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Ch. 2 - Functions and Graphs
Blitzer8th EditionCollege AlgebraISBN: 9780136970514
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Table of contents
- Ch. P - Fundamental Concepts of Algebra311
- Ch. 1 - Equations and Inequalities398
- Ch. 2 - Functions and Graphs407
- Ch. 3 - Polynomial and Rational Functions306
- Ch. 4 - Exponential and Logarithmic Functions247
- Ch. 5 - Systems of Equations and Inequalities173
- Ch. 6 - Matrices and Determinants143
- Ch. 7 - Conic Sections124
- Ch. 8 - Sequences, Induction, and Probability251
Chapter 3, Problem 12
Use the graph of y = f(x) to graph each function g.
g(x) = 2f(x)
Verified step by step guidance1
Step 1: Observe the graph of y = f(x). It is a horizontal line segment from (1, -3) to (4, -3), meaning the function f(x) is constant and equal to -3 for all x in the interval [1, 4].
Step 2: Understand the transformation g(x) = 2f(x). This means that the values of f(x) are multiplied by 2 to produce g(x). Mathematically, g(x) = 2 * (-3) = -6 for all x in the interval [1, 4].
Step 3: Determine the new graph of g(x). Since g(x) is constant and equal to -6, the graph of g(x) will also be a horizontal line segment, but at y = -6 instead of y = -3.
Step 4: Plot the new line segment for g(x). The endpoints of the line segment will remain the same in terms of x-coordinates, so the new line segment will extend from (1, -6) to (4, -6).
Step 5: Label the graph appropriately. Indicate that the new graph represents g(x) = 2f(x), and ensure the horizontal line segment is clearly drawn at y = -6 between x = 1 and x = 4.
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Video duration:
1mKey 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 vertical or horizontal shifts, stretches, or reflections. In this case, the function g(x) = 2f(x) represents a vertical stretch of the original function f(x) by a factor of 2, which means that every output value of f(x) is multiplied by 2.
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Domain & Range of Transformed Functions
Graphing Functions
Graphing functions involves plotting points on a coordinate plane based on the function's input-output relationship. For the function g(x) = 2f(x), the graph can be derived from the graph of f(x) by taking each y-coordinate of f(x) and multiplying it by 2, effectively doubling the height of the graph while keeping the x-coordinates the same.
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Horizontal and Vertical Lines
Horizontal lines in a graph represent constant functions where the output value remains the same regardless of the input. In the provided graph, f(x) is a horizontal line at y = -3 between x = 1 and x = 4. When transforming this line to g(x) = 2f(x), the new line will be at y = -6, maintaining its horizontal nature but at a different vertical position.
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06:49The Slope of a Line
Related Practice
Textbook Question
Use the vertical line test to identify graphs in which y is a function of x.
Textbook Question
Use the graph of y = f(x) to graph each function g.
g(x) = ½ f(x)
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Textbook Question
Find the domain of each function. f(x) = 1/(x2+1) - 1/(x2-1)
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Textbook Question
Use the given conditions to write an equation for each line in point-slope form and general form. Passing through (5, −9) and perpendicular to the line whose equation is x + 7y - 12= 0
Textbook Question
Find the distance between each pair of points. If necessary, express answers in simplified radical form and then round to two decimal places. (0, −√3) and (√5, 0)
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