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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! …

  2. Functions | College Algebra | Math | Khan Academy

    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.

  3. 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 - …

  4. 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.

  5. How to find the range of a function (video) | Khan Academy

    The range of a function is the set of all possible outputs the function can produce. Some functions (like linear functions) can have a range of all real numbers, but lots of functions have a more …

  6. Functions: FAQ (article) - Khan Academy

    Functions are used in all sorts of real-world applications! For example, we use functions to model physical processes, like the motion of a car or the growth of a population.

  7. Trigonometric functions | Trigonometry | Math | Khan Academy

    Practice Midline of sinusoidal functions from graph Get 3 of 4 questions to level up!

  8. Rational functions (video) - 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 …

  9. Multivariable functions (video) | Khan Academy

    An introduction to multivariable functions, and a welcome to the multivariable calculus content as a whole.

  10. Intro to inverse functions (video) | Khan Academy

    Let's think about what functions really do, and then we'll think about the idea of an inverse of a function. So let's start with a pretty straightforward function.