(Old) Domino Effect

How much is Domino’s really charging for pizza?

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(Old) Domino Effect

How much is Domino’s really charging for pizza?

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A newer, better version of this lesson is available! Explore all updated lessons here, or read more about the updates in Our Community.

2023-2024 Versions

In the fall of 2024, Citizen Math released updated versions of every lesson in our library, plus a few new ones! We know you may have already prepped an earlier version or planned a repeat of last year, so we're continuing to make these earlier versions available through Thursday December 5, 2024.

You can find the new lessons through the regular search, and we hope you love them as much as we do. You can read more about these updates in Our Community.

Click here for the updated version of this lesson!

How much is Domino’s really charging for pizza? Domino’s Pizza offers a high-tech website for customizing and tracking your pizza. But it’s hard to know how much the pizza actually costs until right before you buy it.

In this lesson, students use slope, y-intercept, and linear equations to explore the costs of different-sized pizzas at Domino’s and debate whether the pizza chain should be more transparent in its pricing.

REAL WORLD TAKEAWAYS

  • Posted prices – or the fact that they’re hidden! – affect consumer behavior. Businesses choose when and how to share the price of items.

MATH OBJECTIVES

  • Given two points, calculate the rate of change between them
  • Write a linear equation from a rate of change and y-intercept
  • Graph a linear equation

Great anytime, including at the beginning of a unit before students have any formal introduction to the topic.
Grade 8
Writing Linear Equations
Grade 8
Writing Linear Equations
Content Standards
Mathematical Practices

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