Lesson plan

Interpret functions by comparing the relationship between quantities represented in the same representation

teaches Common Core State Standards CCSS.Math.Content.8.F.A.1 http://corestandards.org/Math/Content/8/F/A/1
teaches Common Core State Standards CCSS.Math.Content.8.F.A.2 http://corestandards.org/Math/Content/8/F/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Big Ideas: Functions can be represented in multiple representations. Functions can be compared by comparing common features, like rate of change and y-intercept. This task builds on students’ prior work with identifying functions (8.F.1) and finding rate of change (7.RP.2). It extends students’ knowledge that functions help us understand the world around us and can be represented multiple ways (8.F.5). It provides students with opportunities to interpret two verbal descriptions of a function and create meaningful models as a means of comparison. This task builds a foundation for students to compare functions illustrated in different representations (8.F.2). Vocabulary: rate of change, function, increasing, decreasing Special Materials: graph paper