Introducing Function Graphs: Day 1 of 3

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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

15 minutes

Previous Preparation:

Follow the link to Dan Meyer's Blog and print the GraphingStories Graph Paper - one sheet per student. This will be their bellringer paper for the next week.

You may also want to open the two videos you plan to use today early so they can buffer on your screen and run smoothly without pausing for your students. I suggest using one elevation vs. time and one distance vs. time graph today to open the unit

Beginning the New Activity

30 minutes

Wrapping-up + Homework

5 minutes

Assign the walking directions as homework. Each partnership was given two graphs so each partner can take one home and finish the walking directions for that one graph, if it was not completed during class. Inform students that the competition begins tomorrow so finishing the homework is vital to team participation. I would encourage students to talk that night in Edmodo.com or other means to ensure they both agree with final product.

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Algebra I » Graphing Linear Functions