7.3 Proportional Relationships

Beginning Lesson

Aws4 request&x amz signedheaders=host&x amz signature=4b00f0bdc5787cd638ce8074ffeb54db6af5d97a1bfcc2e6048123b42e9143eb

New Twenty

How does life expectancy affect how you live your life? Students use proportions to determine what life expectancy must have been in the past in order for the phrase "30 is the new 20" to be accurate, and explore how life might change as life expectancy changes.

Topic: Ratios and Proportional Relationships (RP)

Middle Lessons

Aws4 request&x amz signedheaders=host&x amz signature=4682b8fbe9f27f403f02ba82e7f9eee16facf9b2131c428cb18413901eec6ff3

Civic Duty

Is it worth paying extra for a hybrid car? Students use proportional reasoning to determine how much hybrid owners save on gas, and how long it will take to make up the price difference.

Topic: Expressions and Equations (EE), Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=bd7bc4b37e89ce7ca506b8c93c24341c95daf287f5087438a4c5043af440e3b5

Coupon Clipping

Are coupons always a good deal? Students use unit rates and percents to explore the math and psychology behind retail discounts.

Topic:
Aws4 request&x amz signedheaders=host&x amz signature=79c807e8be995a5cbe2ddeda0f47c0dd790fce3808a9e72b4a6eab46add24f3f

Family Plan

How much should you pay for a shared wireless plan? Students use proportional reasoning to predict whether a family will go over their minutes, messages, or megabytes, and decide how much each person should pay.

Topic: Expressions and Equations (EE), Number System (NS), Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=ff4fc32244f1819c79f86bb7469c75105d8f42167195216f0b2172f877e9110b

I'd Like to Buy a Vowel

How much should vowels cost on Wheel of Fortune? Students use ratios and percents to explore what would happen if Wheel of Fortune charged prices for vowels based on how often they come up.

Topic: Ratios and Proportional Relationships (RP), Statistics and Probability (SP)
Aws4 request&x amz signedheaders=host&x amz signature=eb6fbe42d46c48faa9dc75382fc14a5e68dfac61505ec0fb81de1a308e919024

Need for Speed

How much does it cost to drive at different speeds? Students use unit rates and proportions to explore how a car's fuel economy changes as it drives faster and faster.

Topic: Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=a07a4a65db759d6204018782a384f906a0760945641593dc5b3ff29298fb257f

Text Me Later

How dangerous is texting and driving? Students use proportional reasoning to determine how far a car travels in the time it takes to send a message, and explore the consequences of distracted driving.

Topic: Ratios and Proportional Relationships (RP), Circles (C)

End Lessons

Aws4 request&x amz signedheaders=host&x amz signature=8f6d244ad1b0ef5e226bc0bbe44077e02bb89050b727542d1cc4186ee4186f26

On Your Mark

Do taller sprinters have an unfair advantage? Students use proportions to find out what would happen if Olympic races were organized by height.

Topic: Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=f4b766dcd8d2d3477e9f38ac8ac99ccad2f3f618eb241573212f3716eef88cad

Coupon Clipping

Are coupons always a good deal? Students use unit rates and percents to explore the math and psychology behind retail discounts.

Topic:
Aws4 request&x amz signedheaders=host&x amz signature=4fda305a7a91213a164f62c97f06dd0898dfa65c15d965165e9c7d028d7da44a

Family Plan

How much should you pay for a shared wireless plan? Students use proportional reasoning to predict whether a family will go over their minutes, messages, or megabytes, and decide how much each person should pay.

Topic: Expressions and Equations (EE), Number System (NS), Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=ad8e05556686f6f75671d3d887afe7f4601697e1374245794efda9b5e40bc283

Need for Speed

How much does it cost to drive at different speeds? Students use unit rates and proportions to explore how a car's fuel economy changes as it drives faster and faster.

Topic: Ratios and Proportional Relationships (RP)
Aws4 request&x amz signedheaders=host&x amz signature=a07a4a65db759d6204018782a384f906a0760945641593dc5b3ff29298fb257f

Text Me Later

How dangerous is texting and driving? Students use proportional reasoning to determine how far a car travels in the time it takes to send a message, and explore the consequences of distracted driving.

Topic: Ratios and Proportional Relationships (RP), Circles (C)