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# Unit Rates and Proportional Reasoning - PowerPoint PPT Presentation

= \$2.73 unit price • number of units = total price. COURSE 2 LESSON 5-2. Unit Rates and Proportional Reasoning. Use the unit price to find the total price: 7 yd of ribbon at \$.39 per yard. \$.39 • 7. The total price of 7 yd of ribbon is \$2.73. 5-2. price number of lb. \$.89 3.

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= \$2.73 unit price • number of units = total price

COURSE 2 LESSON 5-2

Unit Rates and Proportional Reasoning

Use the unit price to find the total price: 7 yd of ribbon at \$.39 per yard.

\$.39 • 7

The total price of 7 yd of ribbon is \$2.73.

5-2

number of lb

\$.89

3

\$.30/lb

price

number of lb

\$1.59

5

\$.32/lb

COURSE 2 LESSON 5-2

Unit Rates and Proportional Reasoning

Find each unit price. Then determine the better buy.

3 lb of potatoes for \$.89

5 lb of potatoes for \$1.59

Divide to find the unit price of each size.

Since \$.30 < \$.32, 3 lb of potatoes for \$.89 is the better buy.

5-2

\$1.08/lb; \$1.10/lb; 20 lb for \$21.50.

COURSE 2 LESSON 5-2

Unit Rates and Proportional Reasoning

1. It took Anthony 5 h 45 min to complete a 25-mi walkathon. What was his average speed in miles per hour? Round your answer to the nearest hundredth.

2. A 20-lb bag of dog food costs \$21.50. A 30-lb bag of the same dog food costs \$32.90. Find each unit price. Then determine the better buy.

5-2