Pupils use graphs to analyze two pricing schemes for postcards. After determining which is the best deal, individuals determine what is wrong with the other pricing structures and explain their thinking.

Concepts

functions, graphing functions, linear functions, piecewise functions

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Additional Tags

math

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Instructional Ideas

• Have the class devise a good deal for pricing postcards
• Develop algebraic relationships that represent the pricing schemes

Classroom Considerations

• Class members should be able to graph functions described verbally

Pros

• Answer key provides an example of how the graph could be done
• Assessment item provides a solution direction based on the questions asked

Cons

• None

Common Core

HSN-Q.A.1 HSN-Q.A.2 HSF-IF.B.4 HSF-IF.B.5 HSF-IF.C.7.a MP5 MP6