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Lesson Plan

Determine the y-intercept of a function by interpreting its graph and equation

teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Content.8.F.A.3 http://corestandards.org/Math/Content/8/F/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
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Big Ideas: Linear functions have a unique slope and y-intercept. The slope and y-intercept of a linear function can be found in the equation y = mx + b. The slope and y-intercept of a linear function can be found in the graph of its line. This task builds on students’ prior work with rate of change (7.RP.2), comparing functions(8.F.2), and the relationship between distance, rate, and time. It extends students' knowledge of rate of change and initial value of a function to represent the relationship between two (x,y) values with y=mx+b and emphasizes the impact of the y-intercept on a function. This builds a foundation for later work with transformations of functions. Vocabulary: rate of change (slope), initial value (y-intercept) Special Materials: Supplemental Handout "Amazing Race" dry spaghetti noodles
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