How much is My Cell Phone Plan?

In this lesson, shopping for cell phone plans provides a motivating context where students will compare and interpret the properties of two functions represented in different ways. The lesson starts with students examining and discussing an input/output table to identify rate of change and y-intercept. Students will then be hooked by the talk of cell phones. Students will be assigned a group. Each group will solve two different problems involving cell phone plans. They have to determine the rate of change, y-intercept, and the total cost after two years. Students will be assigned homework and have a summative assessment the next day.

Resource ID#: 47935 Type: Lesson Plan

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General Information

Subject(s): Mathematics

Grade Level(s): 8

Intended Audience: Educators

Suggested Technology: Document Camera, Graphing Calculators, LCD Projector, Overhead Projector, Microsoft Office

Instructional Time: 45 Minute(s)

Resource supports reading in content area:Yes
Freely Available: Yes

Keywords: properties of functions, functions, rate of change, slope, y-intercept

Instructional Component Type(s): Lesson Plan

Instructional Design Framework(s): Direct Instruction

Resource Collection: CPALMS Lesson Plan Development Initiative

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