Unit 1: Proportional Reasoning

OEQ: What kind of questions can be answered using proportional reasoning?

Set up a table in your notes and complete it:

6 melons cost $12. How much does one melon cost?

3 watermelons cost $15. How much does one watermelon cost?

3 apples cost $.99. How much does one apple cost?

Answer: Answer: Answer:

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Check Your Answers with the class:

6 melons cost $12. How much does one melon cost?

3 watermelons cost $15. How much does one watermelon cost?

3 apples cost $.99. How much does one apple cost?

Answer: $2 per melon

Answer:$5 per

watermelon

Answer:$0.33 per

apple

Various methods

Various methods

Various methods

Look at the last row, what is that called?

6 melons cost $12. How much does one melon cost?

3 watermelons cost $15. How much does one watermelon cost?

3 apples cost $.99. How much does one apple cost?

Answer: $2 per melon

Answer:$5 per

watermelon

Answer:$0.33 per

apple

Unit Rate

ORatio in which the second term or denominator is, 1.

Using Pictures to Find Unit

Rates

How are you going to draw a picture to find the

unit rate?OAt Ralph’s fruit stand you can buy 3 apples for $0.90. How much will you pay for 1 apple?

What did you draw?

Draw a Picture to Find the Unit Rate

OAt Ralph’s fruit stand you can buy 4 oranges for $0.90. How much will you pay for 1 orange?

What did you draw?

Draw a Picture to Find the Unit Rate

OAt a bank in England 3 U.S. dollars can be exchanged for 2 British pounds. How many British pounds will you receive for 1 U.S. dollar?

What did you draw?

Draw a Picture to Find the Unit Rate

OAt a bank in England 3 U.S. dollars can be exchanged for 2 British pounds. How many U.S. dollars will you receive for 1 British pound?

What did you draw?

In your Learning Log Spiral, answer the following question

in a complete sentence:

How are unit rates represented in the real

world?