It's all about lines when going around. Pupils graph the relationship between the length of a side of a square and its perimeter. Class members explain the origin in context of the side length and perimeter. They compare the graph to the graph of a circle's diameter and circumference using the intercepts and slope.

Concepts

perimeter, linear, graphing linear equations, linear equations, linear equations writing, slope, rate of change, proportions

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Additional Tags

math

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Instructional Ideas

• Give the class several opportunities to compare two graphs

Classroom Considerations

• The standard 8.F.B.4 may be a better fit than 8.EE.C.7.b
• Class members should be able to graph points presented as a table

Pros

• The rubric includes point allotments for each sub-portion of the assessment
• Provides information on how a sample performed on the questions during a national math assessment

Cons

• None

Common Core

8.EE.B.5 8.EE.C.7.a 8.EE.C.7.b MP7 MP8