Unfortunately, most items lose value over time. The lesson presentation shows how to model this depreciation with a linear expression. After writing the expression, the instructor demonstrates how to use it to predict the time it takes for the item to reach a specified value.

Concepts

linear equations, linear equations applications, linear equations writing, problem solving strategies

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Additional Tags

math

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Instructional Ideas

• Review the meaning of appreciation and depreciation prior to the lesson
• Incorporate the video lesson on a day that requires a substitute

Classroom Considerations

• Expects previous experience with linear modeling

• This video is hosted on YouTube

Pros

• Presents the answer to the application question in a complete sentence
• Provides an option for closed captioning to support note taking

Cons

• None

Common Core

SL.8.2 SL.9-10.2 HSA-CED.A.1 RST.6-8.7 RST.9-10.7