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Lesson Plan

Direct and Inverse Variations

Curated and Reviewed by Lesson Planet

Enhance pupil understanding of proportions and variable relationships by studying direct and inverse variation. Use the idea of a proportional relationship to teach direct variation. Then use a similar pattern to help individuals understand inverse variation. 

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CCSS: Adaptable
Concepts
direct variation, inverse variation, linear relationships, rational functions, problem solving strategies
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Additional Tags
math
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Instructional Ideas
  • Use the second example as an opener and allow pupils to develop strategies to determine a solution
  • Compare and contrast direct and inverse variation with your classes
Classroom Considerations
  • Builds from the previous lesson in this series on proportions
  • The lesson concludes an 11-part series on fundamental algebraic concepts
Pros
  • Uses real-life application to build the concept of variation
  • Provides a set of practice problems that includes a problem-solving section
Cons
  • Moves quickly to the formula for direct and inverse variation before developing an understanding of the concept