Introducing Function Graphs Completed: Day 3 of 4

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Objective

SWBAT interpret and sketch graphs of real world events.

Big Idea

Interpret graphs to win big and create the best motion detector function graph in the class. Vote to win!

Lesson Author

Christa Lemily

Bowling Green, KY

Grade Level

Eighth grade

Subjects

Math

graphing linear functions

Algebra

Standards

8.F.A.1

Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output. (Function notation is not required in Grade 8.)

8.F.B.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.

MP1

Make sense of problems and persevere in solving them.

MP3

Construct viable arguments and critique the reasoning of others.

MP4

Model with mathematics.

MP7

Look for and make use of structure.

Bellringer Warm-up

10 minutes

Finishing the Activity

35 minutes

Student Participation

Introducing Functions Student Participation Reflection-2.mov

The goal today is to finish using the motion detector by walking all remaining graphs. A whole group wrap-up session is tomorrow to bring out important ideas such as linear vs. non-linear graphs, what it means to be a function and why, domain, and range.

Wrapping Up

5 minutes

Walking the Impossible Graphs

Walking the Impossible Graphs.mov

Important tonight is to prepare the website or other voting device for votes to begin. I am including a video of how I use the internet to assist in student voting. End the class period with similar questions as yesterday, "Why are some graphs impossible to walk? How many people can the motion sensor pick-up at one time? What quantity was always moving forward independently of your written changes in direction (domain is time)?"

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Algebra I Â» Graphing Linear Functions