 Domino’s pizza is delicious. The company’s success is proof that people enjoy their pies. The company is also tech savvy: you can order online, and they even have a pizza tracker so you can keep tabs on your delivery!

The website is great. But one thing it’s not is transparent. Domino's does not tell you how much the component pieces cost; they only tell you an item's final price after you build it. In this lesson, students use linear equations to find the base price (y-intercept) and cost per additional topping (slope). Let's find out how much Domino's is really charging for pizza.

### Students will

• Understand the ideas of slope and y-intercept within the context of Domino’s pizza pricing
• Write and graph a linear equation given two points on the line
• Understand what it means for a function to be linear (constant rate of change)

### Before you begin

Students should be able to calculate a unit rate (e.g. “cost per topping”). As this lesson is meant to be introductory, no prior knowledge of linear functions is assumed.

Domino's Pizza