Lesson plan

Graph proportional relationships by identifying and plotting ordered pairs

teaches Common Core State Standards CCSS.Math.Content.8.EE.B.5 http://corestandards.org/Math/Content/8/EE/B/5

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Big Ideas: An understanding of rate of change enables us to compare proportional relationships presented in different ways (in tables, graphs, equations, and verbal descriptions). On the coordinate plane, a graph of a proportional relationship will appear as a line passing through the origin; the rate of change of that relationship will be the slope of that line. In this lesson, students will learn to graph proportional relationships. They will identify examples and non-examples of proportional graphs, and they will create graphs from proportional relationships presented as verbal descriptions, equations, and tables. They will also demonstrate understanding of reasonable values for proportional graphs from real-world situations. Vocabulary: proportional relationship; rate of change; independent variable; dependent variable; x- and y-axis Special Materials: grid paper, straight edge