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FLORIDA Pre-Algebra Teacher’s Guide Vol. A

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Use this guide to accompany Lesson 6.12, Semester A. Function Stories LESSON GOALS • Describe the real-world relationship between two quantities depicted on a graph. FLORIDA STANDARDS • MAFS.8.F.2.5 Describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). Sketch a graph that exhibits the qualitative features of a function that has been described verbally. • MAFS.K12.MP.1.1 Make sense of problems and persevere in solving them. PACING One class period, approximately 60 minutes LEARN MATHCAST: FUNCTION STORIES In this MathCast, the graph of a bike trip is analyzed. The altitude is decreasing in Parts A and C. In Part B, the altitude is constant, so the biker could be resting. The horizontal distance for each part tells how much time it takes. MATERIALS • reference Guide pages 246–248 • Practice Activity Book pages 243–249 • Overview and Toolkit presentations KEYWORDS Students can preview definitions of keywords hyperlinked throughout the lesson. • constant function • decreasing function • increasing function 332 FuNCTION STOrIeS

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