Goal: The learner will write rates, equivalent rates, and unit rates.

1
Lesson 8.2

• Goal The learner will write rates, equivalent
  rates, and unit rates.

2
Hows a Rate Different than a Ratio?

• Rate comparison of two different units
• For Example Miles per hour
• Unit Rate has a denominator of 1 unit.

3
Write an Equivalent Rate
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Write an Equivalent Rate

• Just like ratios, rates can be reduced.
• The International Space Station orbits Earth at
  an average rate of 15 miles every 3 seconds. How
  long will it take the space station to travel 150
  miles?

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Lets take that answer and change it.

• Write the answer as a unit rate.
• We need a denominator of 1!
• Divide the numerator by the denominator.

6
Write as a unit ratio.
7
Applying a Unit Rate

• There are 2.54 cm in 1 in. How many centimeters
  are in 3 inches?

8
Comparing Unit Rates

• A 12 ounce tub of popcorn costs 3.00. A 20
  ounce tub of popcorn costs 4.00. Which tub is
  the better buy? Explain.

9

• Your friend purchases 26 bagels for 10.40. You
  purchase 39 bagels at a price of 3 bagels for 1.
  Which purchases is the better buy?

10
Assignment

• P. 409 1-3, 4-12 evens, 16-22 evens