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  1. Rational functions | Precalculus | Math | Khan Academy

    Divide one polynomial by another, and what do you get? A rational function! We'll analyze the family of rational functions, and we'll see some examples of how they can be useful in …

  2. Rational functions | Integrated math 3 | Khan Academy

    We'll learn how to simplify, multiply, and divide rational expressions, as well as add and subtract them—whether they're factored or not. We'll also dive into understanding the graphs of rational …

  3. Rational expressions, equations, & functions | Khan Academy

    This topic covers: - Simplifying rational expressions - Multiplying, dividing, adding, & subtracting rational expressions - Rational equations - Graphing rational functions (including horizontal & …

  4. Rational functions (video) | Functions | Khan Academy

    What are rational functions? How do we plot them? What is their domain and range? Let's find out. We break down the definition of the function given in set-builder form and plot the graph …

  5. Rational functions: FAQ (article) | Khan Academy

    Rational functions can be used in a variety of ways to model real-world situations. For example, we can use a rational function to model the speed of a car that's braking, or the amount of a …

  6. Intro to rational expressions (article) | Khan Academy

    Learn what rational expressions are and about the values for which they are undefined.

  7. Graphing rational functions 1 (video) | Khan Academy

    So I have a homework question telling me to graph the rational function y=1/x and explain what is useful to see on the calculator and what is challenging. I knew what is useful and said how you …

  8. Graphing rational functions according to asymptotes

    Learn how to find removable discontinuities, horizontal asymptotes, and vertical asymptotes of rational functions. This video explores the specific example f (x)= (3x^2-18x-81)/ (6x^2-54) …

  9. Rational functions and equations | Algebra 2 (TX TEKS) - Khan …

    Simplify and solve rational expressions and equations, and model real-world problems involving rates and variation. **Unit guides are here!** Power up your classroom with engaging …

  10. Dividing rational expressions (article) | Khan Academy

    A rational expression is a ratio of two polynomials. The domain of a rational expression includes all real numbers except those that make its denominator equal to zero.