Direct Variation Explained – Identify, Graph, and Write Equations (y = kx)

Learn everything you need to know about direct variation in this complete math lesson. Students will learn how to identify direct variation from tables, equations, graphs, and real-world situations, and how to write equations in the form y = kx. This video walks through multiple examples to help you understand the key idea of constant of proportionality (k) and how it connects to slope and rate of change. In this lesson, you will learn how to: Determine if a table represents direct variation by checking if y/x is constant Recognize when an equation is NOT direct variation Graph direct variation equations and interpret slope Write direct variation equations from real-world contexts Verify direct variation using points and slope Key concepts covered: Direct variation must be in the form y = kx The ratio y/x must be constant The graph must pass through (0,0) The value of k represents the slope and rate of change This lesson supports CCSS 8.F.B.4, helping students construct and analyze linear relationships and understand proportional relationships as a special type of linear function. Perfect for 8th grade math, Algebra 1, and anyone learning about proportional relationships and linear functions. #directvariation #ProportionalRelationships #yEqualsKx #algebra #8thGradeMath #mathhelp #linearfunctions #rateofchange #slope #middleschoolmath Time Stamps: 00:00 - Intro 00:34 - Identify Direct Variation from a Table 02:06 - Identify a Non-Direct Variation 03:11 - Graph and Interpret Direct Variation 04:34 - Write a Direct Variation from Context 06:06 - Write a Direct Variation from a Description 07:33 - Verify Direct Variation from Points 09:51 - Outro #MathHelp #MinuteMath #MathMadeSimple #MathTutorial #MathSkills #Education #Math #CommonCoreMath #MinuteMath #MathLessons #MathVideos Are you a teacher Looking for a worksheet for this video? Visit our Education Shop! https://minutemath.com/product-category/faculty-resources/ Visit our website Math Help and Math Merch: https://minutemath.com/ Follow us for... Tweets: https://twitter.com/minutemath Instagram: https://www.instagram.com/minutemath/ TikTok: https://www.tiktok.com/@therealminutemath Facebook: https://www.facebook.com/MinuteMath/ Business Instagram: https://www.instagram.com/minutebusinessacademy/ Amazon Store: https://www.amazon.com/shop/minutemath Teachers Pay Teachers: https://www.teacherspayteachers.com/Store/Minutemath Personal Instagram: https://www.instagram.com/gannonforpresident/