https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/v/what-is-a-function 2021-06-30T18:10:09Z What is a function? Functions assign a single output for each of their inputs. In this video, we see examples of various kinds of functions. Sal Khan video https://cdn.kastatic.org/googleusercontent/whRX1xQJEDdGcWfqUl8w5525C24vlDY-jZPlw-V9OTDxzG7Adv25nPLwbaP1FKUH4HK6R7YTRYoSCB9n4fLieb7A What is a function? Functions assign a single output for each of their inputs. In this video, we see examples of various kinds of functions. https://cdn.kastatic.org/ka-youtube-converted/kvGsIo1TmsM.mp4/kvGsIo1TmsM.mp4 477 Evaluating functions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/v/understanding-function-notation-example-1 2021-06-30T18:10:08Z Worked example: Evaluating functions from equation Learn how to evaluate f(x)=49-x² at x=5. Sal Khan video https://cdn.kastatic.org/googleusercontent/03JkypsEnHQbMacEEnDhM2q7NzHC0H8z9r5kzGCVuoZU6lPVF8p6FjvFPLQR4CeQfKoJkRVn0ROCTWHfZTMhBDST Worked example: Evaluating functions from equation Learn how to evaluate f(x)=49-x² at x=5. https://cdn.kastatic.org/ka-youtube-converted/Id6UovYjd-M.mp4/Id6UovYjd-M.mp4 59 Evaluating functions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/e/functions_1 2026-03-24T23:41:07.080866137Z Evaluate functions Evaluate functions for specific inputs given the formula of the function.  Functions are written using function notation. Tomer Gal exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/v/understanding-function-notation-example-2 2021-06-30T18:10:10Z Worked example: Evaluating functions from graph Evaluating a function at x=-1 using the graph of that function. Sal Khan video https://cdn.kastatic.org/googleusercontent/rut742_LAfXpdb93Uk5lXue9m1yQuXStNvQkA3Ts6i_NZSMPTq2v6e4uPyFb9qkdLHy_pI1Jfzhg_aILSJVs9aYq Worked example: Evaluating functions from graph Evaluating a function at x=-1 using the graph of that function. https://cdn.kastatic.org/ka-youtube-converted/kzYtx_AqzjM.mp4/kzYtx_AqzjM.mp4 44 Evaluating functions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/v/evaluate-discrete-function 2021-05-05T14:53:18Z Evaluating discrete functions Given the graph of a discrete function, Sal shows how to evaluate the function for a few different values. video https://cdn.kastatic.org/googleusercontent/ecWZg-h2Vqx3jang_sOahqQD_8LLIL0kn13WjDaxxx2wXtiTG4mSVzjqOBzUB4q8dj98xhzZ9BIr6Ekv9RLjRWxU Evaluating discrete functions Given the graph of a discrete function, Sal shows how to evaluate the function for a few different values. https://cdn.kastatic.org/ka-youtube-converted/Ddw8u7nNmKs.mp4/Ddw8u7nNmKs.mp4 200 Evaluating functions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/e/evaluate-functions-from-their-graph 2025-03-01T15:52:37.13987578Z Evaluate functions from their graph Evaluate functions for specific inputs given the graph of the function.  Functions are written using function notation. Tomer Gal exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/v/evaluating-a-function-expression 2021-05-05T14:53:16Z Worked example: evaluating expressions with function notation Evaluating -2⋅f(-6)+g(1) given the graphs of f and g. Sal Khan video https://cdn.kastatic.org/googleusercontent/YKP2rM8yG9hZN7PUlmN98YZS9KHZw3_yOuZ5IKFPrCOwmdpLxHSQa6ThDRyAyFaYHvO2Ib0mDNxNuEJV4GRoEFyN Worked example: evaluating expressions with function notation Evaluating -2⋅f(-6)+g(1) given the graphs of f and g. https://cdn.kastatic.org/ka-youtube-converted/uaPm3Tpuxbc.mp4/uaPm3Tpuxbc.mp4 83 Evaluating functions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:evaluating-functions/e/functions_2 2026-03-30T02:13:19.287181419Z Evaluate function expressions Evaluate expressions that contain function notation, given the functions' graphs. Tomer Gal exercise