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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. 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 …

  4. Functions (video) | Function definitions | Khan Academy

    Learn how to use functions to package a block of code and parameters to generalize it. Learn how to write your own function definitions, and explore how the computer executes a function call.

  5. 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.

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

    Inputs and outputs of a function Learn Worked example: matching an input to a function's output (equation) Worked example: matching an input to a function's output (graph) Worked example: …

  7. Algebra (all content) - Khan Academy

    Unit 5 System of equations Unit 6 Two-variable inequalities Unit 7 Functions Unit 8 Absolute value equations, functions, & inequalities Unit 9 Quadratic equations & functions Unit 10 Polynomial …

  8. Multiplying and dividing functions (article) | Khan Academy

    See how we can multiply or divide two functions to create a new function. Just like we can multiply and divide numbers, we can multiply and divide functions. For example, if we had functions f …

  9. Algebra 1 | Math | Khan Academy

    The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a …

  10. Worked example: evaluating expressions with function notation

    If you've seen the earlier videos, you will understand that functions simply generate an output from an input. Thus, there are infinite applications - it's used anytime there is a correlation …