Lesson plan

Recognize the differences between exponential and linear growth by examining salary increases

teaches Common Core State Standards CCSS.Math.Content.HSF-LE.A.1 http://corestandards.org/Math/Content/HSF/LE/A/1
teaches Common Core State Standards CCSS.Math.Content.HSF-LE.A.1a http://corestandards.org/Math/Content/HSF/LE/A/1/a

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Big idea: Linear functions grow by repeated addition over equal intervals, while exponential functions grow by repeated multiplication over equal intervals. This lesson plan is meant as an introduction to the idea of exponential growth, and how it differs from linear growth. The task introduces two pay options for a job, one growing by $50 per day, and one doubling each day. This task will develop intuition for exponential growth's repeated multiplication. The concepts in this lesson build towards students' future work writing and graphing exponential functions. This pay option scenario is used repeatedly throughout the unit to build understanding. Vocabulary: linear growth, exponential growth