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The document introduces the concept of functions and provides guided practice problems, including modeling cell phone plans and yoga studio memberships with linear equations. By analyzing costs and variables, students learn how to translate descriptive scenarios into algebraic expressions. 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 \n• How can you write a function that models a given scenario?  \nPractice Problem \\#1  \nA cell phone plan charges $25 per month and an additional $0.50 per gigabyte of data used.  \nWrite a function that models this plan and state what your variables represent.  \ny: ___________________  \nx: ___________________  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets [at ](at www.mashupmath.com)[www.mashupmath.com](at www.mashupmath.com) 1  \nPractice Problem \\#2  \nA yoga studio membership costs $16.50 per month and an additional $3 per class attended.  \nWhat a function that models this membership plan.  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets [at ](at www.mashupmath.com)[www.mashupmath.com](at www.mashupmath.com) 2  \nANSWER KEY  \nPractice Problem \\#1 : 􀀡 􀀡 = 􀀡􀀢 + 􀀡 . 􀀡􀀢􀀣  \nPractice Problem \\#2: 􀀡 􀀡 = 􀀡􀀢 . 􀀡 + 􀀡􀀡  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets [at ](at www.mashupmath.com)[www.mashupmath.com](at www.mashupmath.com) 3","cbCaimZHtNQlXv3W","https://ap.wps.com/l/cbCaimZHtNQlXv3W","pdf",761640,"English","# How to Write a Function\n## Key Questions\n## Practice Problem 1\n## Practice Problem 2\n## Answer Key","[{\"question\":\"What is the primary goal of this lesson guide?\",\"answer\":\"The goal is to help students learn how to write mathematical functions that model given real-world scenarios.\"},{\"question\":\"How do you model a cell phone plan as a function?\",\"answer\":\"You define the base monthly charge and the variable cost per gigabyte, resulting in a linear function where y represents total cost and x represents gigabytes used.\"},{\"question\":\"What concepts are addressed in the practice problems?\",\"answer\":\"The problems focus on linear modeling, specifically calculating total costs based on fixed monthly rates and additional variable per-unit charges like phone data or class attendance fees.\"}]","How to Write a Function - Lesson Guide | PDF"]