Use the constant of proportionality to relate the independent variable to the dependent variable. The eighth installment of a 22-part series instructs pupils to use the equation to find the constant of proportionality and then write the equation using a multiplicative factor. Scholars use this relationship to solve for missing values.

Concepts

equations, constant of proportionality, proportional reasoning, proportions, unit rates, independent variables, dependent variables

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Additional Tags

math

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Instructional Ideas

• Get groups to develop a proportional relationship and share it with the class to create the equation

Classroom Considerations

• Class members should be able to calculate the constant of proportionality
• Requires knowledge of how to determine whether a relationship is proportional

Pros

• The problems require the comparison of relationships presented differently
• Answer keys show the proportions used in the calculations of the unit rate

Cons

• None

Common Core

7.RP.A.2.b MP2