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Algebra 1

4.1.1 Contrasting Two Relationships by Reasoning

Algebra 14.1.1 Contrasting Two Relationships by Reasoning

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Warm Up

Trays of bagels at a bagel shop. Fresh bagels sign. Prices listed. 1 bagel, 1 dollar 25 cents. 6 bagels, 6 dollars. 9 bagels, 8 dollars. 12 bagels, 10 dollars.

A customer at a bagel shop is buying 13 bagels. The store worker says, “That would be $16.25.” Jaime, Pedro, and Hannah, who are in the shop, all think it is a mistake.

  • Jaime says, “Shouldn’t the total be $13.25?”
  • Pedro says, “I think it should be $13.00.”
  • Hannah says, “No, I think it should be $11.25.”

Consider how the store worker, Jaime, Pedro, and Hannah could all be right.

In the following activity, you will be asked to use the pricing information displayed at the bagel shop to determine who is correct about the pricing for 13 bagels.

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