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R ATIOS, R ATES, AND U NIT R ATES Objective: Learn to work with rates and ratios

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R ATE What is a rate? A rate is a comparison of two quantities using division(sounds like ratios, right?) that have different units. Example: Reads “60 miles per 2 hours” This is a unit rate

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U NIT R ATE What is a unit rate? A unit rate is a rate in which the denominator has a quantity of 1 unit. Example: 4 packets of oatmeal per 2 cup of water.

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U NIT P RICE What is a unit price? A unit price is a unit rate that compares cost to item(or cost per item) Example: $5 for 2 bags of family size chips

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A PPLICATION By design, movies can be viewed on screens with varying aspect ratios. The most common ones are Order the width-to-height ratios from least to greatest.

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F INDING U NIT P RICE Black CDs can be purchased in packages of 3 for $4.99, or 10 for $15.49. Which is the better buy?

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E XAMPLE 1: Order the ratios 4:3, 23:10, 13:9, and 47:20 from least to greatest.

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E XAMPLE 2; Use the bar graph below to find the number of acres, to the nearest acre, destroyed in Nevada and Alaska per week.

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E XAMPLE 3: Pens can be purchased in a 5- pack for $1.95 or a 15-pack for $6.20. Which is the better buy?

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Divide. Round answers to the nearest tenth. 1. 2. 3. 4. 23.3 3.5 23.8 23.9 420 18 73 21 380 16 430 18 Warm Up.

Divide. Round answers to the nearest tenth. 1. 2. 3. 4. 23.3 3.5 23.8 23.9 420 18 73 21 380 16 430 18 Warm Up.

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