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Talk or Text


Talk or Text

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In this lesson, students compare different costs associated with two cell phone plans. They write equations with 2 variables and graph to find the solution of the system of equations. They then analyze the meaning of the graph and discuss other factors involved in choosing a cell phone plan.
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Material Type: Assignment
Technical Format: HTML/Text
Date Added to MERLOT: December 15, 2009
Date Modified in MERLOT: October 03, 2016
Keywords: two variable linear equation, system of equations, graph


  • Reviewed by members of Editorial board for inclusion in MERLOT.
    Editor Review
    Very good quality; in queue to be peer reviewed
    avg: 5 rating
  • User review 2.67 average rating
  • User Rating: 2.67 user rating
  • Discussion (1 Comment)
  • Learning Exercises (2)
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Primary Audience: Middle School, High School
Mobile Compatibility: Not specified at this time
Technical Requirements: Adobe software
Language: English
Cost Involved: no
Source Code Available: unsure
Accessibility Information Available: unsure
Creative Commons: unsure


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Discussion for Talk or Text

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Avatar for Anhtai Huynh
7 years ago

Anhtai Huynh (Student)

After spending a good 10-20 minutes looking over the material, I realize this would be quite useful for students to understand a real-life application for math and making use of the equations for it. I looked through it briefly and followed the directions that is describing how to write the equation for that particular situation when comparing different plans. It's very well organized, much like a college syllabus, so it is easy to follow and navigate. The material accurately present concepts of graphing and how to apply a simple equation using the two factors to a graph, which can help us incorporate our understanding of it to harder and much more complicated problems. Although it is very short and intended more for the teacher as a teaching tool, it is still very easy to follow as it is broken down into clear sections, step by step, showing the methods and ways to approach the math.

Technical Remarks:

For a lesson, it's very well organized and easy to follow.
Time spent reviewing site: 10-20 minutes.