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  1. Functions | Algebra 1 | Math | Khan Academy

    About this unit A function is like a machine that takes an input and gives an output. Let's explore how we can graph, analyze, and create different types of functions. Unit guides are here! Power up your …

  2. Functions | Algebra (all content) | Math | Khan Academy

    This topic covers: - Evaluating functions - Domain & range of functions - Graphical features of functions - Average rate of change of functions - Function combination and composition - Function …

  3. What is a function? (video) | Functions | Khan Academy

    Functions assign a single output for each of their inputs. In this video, we see examples of various kinds of functions.

  4. 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 & vertical …

  5. Finding inverse functions (article) | Khan Academy

    Inverse functions, in the most general sense, are functions that "reverse" each other. For example, if f takes a to b , then the inverse, f 1 , must take b to a .

  6. Composite and inverse functions - Math | Khan Academy

    We can compose functions by making the output of one function the input of another one. This simple-yet-rich idea opens up a world of fascinating applications. Inverse functions undo each other when …

  7. Linear equations, functions, & graphs | Khan Academy

    Unit test Test your understanding of Linear equations, functions, & graphs with these 22 questions.

  8. Khan Academy | Khan Academy

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  9. 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 by connecting …

  10. Khan Academy

    Khan Academy ... Khan Academy