Class members must determine the best phone plan for customers. by assessing three different phone plans. Each plan price depends not only the number of minutes, but also the location of the calls — bringing in a third variable. Scholars create graphs to show some of the details of each calling plan.

Concepts

graphing linear equations, linear equations, linear equations applications, systems of linear equations, telephones, rates

Show More Show Less

Additional Tags

math

Show More Show Less

Instructional Ideas

• Use a 3-D function to graph the three phone rates
• Have the class determine the equations for each of the plans

Classroom Considerations

• Resource expects pupils can solve systems of equations

Pros

• Answer key provides sample explanations to solutions
• Assessment uses questions that require not just computational skills but also a conceptual understanding of the scenario

Cons

• None

Common Core

HSA-REI.C.6 HSA-REI.D.11 MP1 MP3