Ever wonder if you can trust the pump that pumps your gas? Budding mathematicians use video evidence to analyze the cost-per-gallon ratio at different intervals for three different pumps. Their goal is to identify the pump that is inaccurate.

Concepts

unit rates, ratios, direct variation

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Additional Tags

math

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Instructional Ideas

• Challenge early finishers to write the function that represents the graph for each pump; check their work on Desmos
• Have pupils collect data from a gas pump when they get their own gas to analyze

Classroom Considerations

• Requires access to Desmos or similar graphing software
• Expects an understanding of unit rate and/or direct variation equations

Pros

• Encourages using multiple representations of the data
• Provides additional questions to answer using the data in the video

Cons

• None

Common Core

7.RP.A.1