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Course 2, Lesson 1-5 Use the four-step plan to solve each problem. 1. A comic book store took in $2,700 in sales of first editions during November. December.

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Presentation on theme: "Course 2, Lesson 1-5 Use the four-step plan to solve each problem. 1. A comic book store took in $2,700 in sales of first editions during November. December."— Presentation transcript:

1 Course 2, Lesson 1-5 Use the four-step plan to solve each problem. 1. A comic book store took in $2,700 in sales of first editions during November. December sales of first editions are expected to be double that amount. If the first editions are sold for $75 each, how many first editions are expected to be sold in December? 2. Nolan is selling coupon books to raise money for a class trip. The cost of the trip is $400, and the profit from each coupon book is $15. How many coupon books does Nolan need to sell to earn enough money to go on the class trip? 3. Porter’s Café made a $6,000 profit during January. Ms. Porter expects profits to increase $500 per month. In what month can Ms. Porter expect her profit to be greater than his January profit?

2 Course 2, Lesson 1-5 ANSWERS 1. 72 2. 27 coupon books 3. May

3 HOW can you show that two objects are proportional? Ratios and Proportional Relationships Course 2, Lesson 1-5

4 Ratios and Proportional Relationships Course 2, Lesson 1-5 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. 7.RP.2 Recognize and represent proportional relationships between quantities. 7.RP.2a Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin. Mathematical Practices 1Make sense of problems and persevere in solving them. 2Reason abstractly and quantitatively. 3 Construct viable arguments and critique the reasoning of others. 4 Model with mathematics.

5 To determine whether two quantities are proportional by graphing them on a coordinate plane Ratios and Proportional Relationships Course 2, Lesson 1-5

6 Ratios and Proportional Relationships Course 2, Lesson 1-5 coordinate plane quadrants ordered pair x-coordinate y-coordinate y-axis origin x-axis

7 How did what you learned today help you answer the HOW can you show that two objects are proportional? Course 2, Lesson 1-5 Ratios and Proportional Relationships

8 How did what you learned today help you answer the HOW can you show that two objects are proportional? Course 2, Lesson 1-5 Ratios and Proportional Relationships Sample answers: By recognizing that the graph of a proportional relationship is a straight line that passes through the origin

9 Describe how you can tell whether a relationship between two quantities is proportional. Ratios and Proportional Relationships Course 2, Lesson 1-5

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