# Brochures

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### Page 360 of 390

Use this guide to accompany Lesson 6.11, Semester A. Describe Functions LESSON GOALS • Describe whether a function is increasing or decreasing using its graph. • Determine where a function is increasing or decreasing using its graph. • Determine whether a function is linear or nonlinear using its 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 CONTENT BACKGROUND Lessons 6.11, 6.12, and 6.13 work together to introduce students to describing and sketching functions. In Lesson 6.11, students learn to describe the graphs of functions by identify the entire function or part of it as increasing, decreasing, or constant and then whether it is linear or nonlinear. Increasing means that as the value of x increases, so does the value of y, Decreasing means that as the value of x increases, the value of y decreases. Constant means that as the value x increases, the value of y does not change. In addition, students can describe the function or parts of the function as linear, meaning that it is a straight line, or nonlinear, meaning not in a straight line. MATERIALS • reference Guide pages 240–244 • Practice Activity Book pages 233–242 • overview and Toolkit presentations KEYWORDS Students can preview definitions of keywords hyperlinked throughout the lesson. • constant function • decreasing function • increasing function • linear function • nonlinear function DeScrIBe FuncTIonS 325

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