Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
5. Rational Functions
Graphing Rational Functions
3:15 minutes
Problem 5
Textbook Question
Textbook QuestionProvide a short answer to each question. What is the equation of the vertical asymptote of the graph of y=1/(x-3)+2? Of the horizontal asymptote?
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Vertical Asymptote
A vertical asymptote occurs in a rational function when the denominator approaches zero, causing the function to approach infinity. For the function y = 1/(x-3) + 2, the vertical asymptote is found by setting the denominator equal to zero, which gives x = 3. This means that as x approaches 3, the value of y will increase or decrease without bound.
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Horizontal Asymptote
A horizontal asymptote describes the behavior of a function as x approaches infinity or negative infinity. For rational functions, if the degree of the numerator is less than the degree of the denominator, the horizontal asymptote is y = 0. In the case of y = 1/(x-3) + 2, as x approaches infinity, the term 1/(x-3) approaches 0, leading to a horizontal asymptote at y = 2.
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Rational Functions
Rational functions are expressions formed by the ratio of two polynomials. They can exhibit unique behaviors such as asymptotes, which are lines that the graph approaches but never touches. Understanding the structure of rational functions is essential for analyzing their graphs, including identifying vertical and horizontal asymptotes, which are critical for sketching the function accurately.
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