https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/v/introduction-to-proportional-relationships 2022-11-16T04:22:43.7414897Z Intro to proportional relationships To know if a relationship is proportional, you should look at the ratios between the two variables. If the ratio is always the same, the relationship is proportional. If the ratio changes, the relationship is not proportional. video https://cdn.kastatic.org/googleusercontent/iHIVxAgFvqfpueAIFhNa1Y864prFFIlB0hNoT2b7OdCNbmSwfF54tPTfecOKv1pHiysT93JYfMeM8RAf0VDSd-7D Intro to proportional relationships To know if a relationship is proportional, you should look at the ratios between the two variables. If the ratio is always the same, the relationship is proportional. If the ratio changes, the relationship is not proportional. https://cdn.kastatic.org/ka-youtube-converted/qYjiVWwefto.mp4/qYjiVWwefto.mp4 230 Direct and inverse proportion https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/v/movie-ticket-proportionality 2021-06-30T17:51:15Z Proportional relationships: movie tickets When going to the movies, is the price you pay proportional to the number of tickets you buy? video https://cdn.kastatic.org/googleusercontent/TuWg5CIYL6iEFbwSG_jTuCw7Sq1MJv0w0DhoKReFWx5NdSfCq1YKgXJJ4SoOSP-TRwiC9XHVM0px6_CHVFAEww4- Proportional relationships: movie tickets When going to the movies, is the price you pay proportional to the number of tickets you buy? https://cdn.kastatic.org/ka-youtube-converted/-YYTUTrxl28.mp4/-YYTUTrxl28.mp4 106 Direct and inverse proportion https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/v/banana-proportionality 2024-06-26T21:44:31.760146908Z Proportional relationships: bananas A proportionality problem about eating bananas. video https://cdn.kastatic.org/googleusercontent/VSszMp-LkkVblAlmjEwcc4SDhDxMXemKY-pcEXRYT1xmBognU_R4-sQhi7YlIxKirzLWGXZa4_a4QgWl6OawoEDx Proportional relationships: bananas A proportionality problem about eating bananas. https://cdn.kastatic.org/ka-youtube-converted/bJb4n19sFrs.mp4/bJb4n19sFrs.mp4 177 Direct and inverse proportion https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/e/analyzing-and-identifying-proportional-relationships-2 2025-11-06T22:30:39.779849795Z Identify proportional relationships Practice telling whether or not the relationship between two quantities is proportional by looking at a table of the relationship. Rhonda Hughes exercise https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/v/testing-whether-area-is-proportional-to-side-length 2021-06-21T15:29:03Z Is side length & area proportional? Sal answers the question by drawing a square and thinking about the relationship between side length and area. video https://cdn.kastatic.org/googleusercontent/w5ZrBVcU7S_eF0IQTCavemMN_Qf3hC8VkJsogr9Ny8nKBhU_Htdg3mRlh1sFfJ0gFdaPWXnOx13K-n6T065hjPbT Is side length & area proportional? Sal answers the question by drawing a square and thinking about the relationship between side length and area. https://cdn.kastatic.org/ka-youtube-converted/Hzz5p0qlObs.mp4/Hzz5p0qlObs.mp4 226 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/direct-and-inverse-variation 2020-11-06T18:53:40Z Intro to direct & inverse variation Sal explains what it means for quantities to vary directly or inversely, and gives many examples of both types of variation. Sal Khan video https://cdn.kastatic.org/googleusercontent/z47mH-BxMUZ1Yrzgu3rebtng4EJg1z5mfzbk8HxVyAuvvxTMw6_CnzpkwbAsqAzPCwgTA2Y6QQ1Mc0bcMjehYOl70Q Intro to direct & inverse variation Sal explains what it means for quantities to vary directly or inversely, and gives many examples of both types of variation. https://cdn.kastatic.org/ka-youtube-converted/92U67CUy9Gc.mp4/92U67CUy9Gc.mp4 594 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/recognizing-direct-and-inverse-variation 2020-11-06T18:53:40Z Recognizing direct & inverse variation Sal gives many examples of two-variable equations where the variables vary directly, inversely, or neither. Sal Khan video https://cdn.kastatic.org/googleusercontent/vV0e0rb72IC_NH2QNpaNxGm96buKN8deIeu0-EvdR7KYV2EWHSuLSi-FWa0VZUbQZrd7JxaYEKM-ZaOxezxXUQUF Recognizing direct & inverse variation Sal gives many examples of two-variable equations where the variables vary directly, inversely, or neither. https://cdn.kastatic.org/ka-youtube-converted/3_DxJwDTbyQ.mp4/3_DxJwDTbyQ.mp4 425 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/e/direct_and_inverse_variation 2025-02-18T07:52:09.551150445Z Recognize direct & inverse variation Given a few two-variable equations, find those that show direct or inverse variation. Tomer Gal exercise https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/direct-inverse-and-joint-variation 2020-11-06T18:53:41Z Recognizing direct & inverse variation: table Sal is given a table with a few values of the variables x and y, and determines whether the variables vary directly or inversely. Sal Khan video https://cdn.kastatic.org/googleusercontent/0aWjMFwDAgJwwEiyh3iTClZNrx4JQu3gdzDbWHIPy97uX8Eh3ZSGkhjJLg6QfR5zObGDbMCGdL23r1exBdTbpWE Recognizing direct & inverse variation: table Sal is given a table with a few values of the variables x and y, and determines whether the variables vary directly or inversely. https://cdn.kastatic.org/ka-youtube-converted/v-k5L0BPOmc.mp4/v-k5L0BPOmc.mp4 330 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/direct-variation-1 2021-06-28T22:10:45Z Direct variation word problem: filling gas Worked example: Model a context about filling gas with a direct variation equation. Sal Khan video https://cdn.kastatic.org/googleusercontent/8FEkx38fQ7Hy3kVkXrwzH2eG9q06krmVD-3UBrmqAi4oAVv920U9H9SbmCzioTDHOdawxsuQ0oOBp2weZLpsjT1e Direct variation word problem: filling gas Worked example: Model a context about filling gas with a direct variation equation. https://cdn.kastatic.org/ka-youtube-converted/rSadG6EtJmY.mp4/rSadG6EtJmY.mp4 219 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/direct-variation-application 2021-06-28T22:10:43Z Direct variation word problem: space travel Sal models a context about space travel with a direct variation equation. Sal Khan video https://cdn.kastatic.org/googleusercontent/T4dzWSxhWVAP2YjPK3MKdv6sIoAEbEe6-E7W4d90X9rSTh_rcWAYVWwdpNCV6N1TC_sbC2fY1npwhLnvHUwzTYvM Direct variation word problem: space travel Sal models a context about space travel with a direct variation equation. https://cdn.kastatic.org/ka-youtube-converted/ZsjfUUJUq9s.mp4/ZsjfUUJUq9s.mp4 122 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/inverse-variation-application 2020-11-06T18:53:41Z Inverse variation word problem: string vibration Sal models a context about lengths of strings and the frequency of their vibrations! with an inverse variation equation. Sal Khan video https://cdn.kastatic.org/googleusercontent/R_4NTByLfhg149OVI4HOdNoXR7KJf9RU6sHOxD2WH8dA_5uOyqOL0jIRSZiOPl7I4ulKELzfPj8My3G6RjwcSFHY3g Inverse variation word problem: string vibration Sal models a context about lengths of strings and the frequency of their vibrations! with an inverse variation equation. https://cdn.kastatic.org/ka-youtube-converted/lkP-E2LUnjA.mp4/lkP-E2LUnjA.mp4 282 Direct and inverse proportion https://www.khanacademy.org/math/algebra-home/alg-rational-expr-eq-func/alg-direct-and-inverse-variation/v/proportionality-constant-for-direct-variation 2020-06-23T07:22:42Z Proportionality constant for direct variation Worked example: y is directly proportional to x, and y=30 when x=6. Find the value of x when y=45. Sal Khan video https://cdn.kastatic.org/googleusercontent/TqecRdK2rrGW3R3-2cGPTlwe2RP-ZMRJBqyNsTaCMhwdLXBJBqHrf6V5ISx7GcY99RyGolcC8Smx1_iEFCpGiWOz Proportionality constant for direct variation Worked example: y is directly proportional to x, and y=30 when x=6. Find the value of x when y=45. https://cdn.kastatic.org/ka-youtube-converted/c6-FJRda_Vc.mp4/c6-FJRda_Vc.mp4 104 Direct and inverse proportion