https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:intervals-where-a-function-is-positive-negative-increasing-or-decreasing/v/increasing-decreasing-positive-and-negative-intervals 2021-05-05T14:53:16Z Increasing, decreasing, positive or negative intervals Function values can be positive or negative, and they can increase or decrease as the input increases. Here we introduce these basic properties of functions. video https://cdn.kastatic.org/googleusercontent/KeH1ZaAKr8tifSfCyQBg3KbdJ8WLhEvNRU-cWfp56Vjz8PpbDAWlHyhmMafXzMNAJSiLalC1tJpIeMk_lGjb9n_X Increasing, decreasing, positive or negative intervals Function values can be positive or negative, and they can increase or decrease as the input increases. Here we introduce these basic properties of functions. https://cdn.kastatic.org/ka-youtube-converted/KxOp3s9ottg.mp4/KxOp3s9ottg.mp4 356 Intervals where a function is positive, negative, increasing, & decreasing https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:intervals-where-a-function-is-positive-negative-increasing-or-decreasing/v/when-a-function-is-positive-or-negative 2021-05-05T14:53:17Z Worked example: positive & negative intervals Finding the positive or negative intervals of a function from its graph. Sal Khan video https://cdn.kastatic.org/googleusercontent/yftE-yB04ulnVybUQY0OsnDeoZdH2H8tIZYQZ-KuJ1KsPQfx2zev9tTjMxwG5mqpR4Wk-zo1aOCmJpGhHz_j7uB0 Worked example: positive & negative intervals Finding the positive or negative intervals of a function from its graph. https://cdn.kastatic.org/ka-youtube-converted/eDv7dk9uNmM.mp4/eDv7dk9uNmM.mp4 70 Intervals where a function is positive, negative, increasing, & decreasing https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:intervals-where-a-function-is-positive-negative-increasing-or-decreasing/e/positive_and_negative_parts_of_functions 2023-12-12T00:32:03.629852833Z Positive and negative intervals Identify intervals on the domain of a function where it's entirely positive or entirely negative. Sid Patel exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:intervals-where-a-function-is-positive-negative-increasing-or-decreasing/e/increasing-decreasing-intervals-of-functions 2025-08-29T01:00:50.274419509Z Increasing and decreasing intervals Highlight intervals on the domain of a function where it's only increasing or only decreasing. Sid Patel exercise