Ratios/Rates/Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

Front

How do you find the cost per item?

Back

To find the cost per item, divide the total cost by the number of items.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a watermelon costs $3.24 for 3 pounds, what is the cost per pound?

Back

$1.08

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate distance traveled at a constant speed?

Back

Distance = Speed × Time.

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CCSS.6.RP.A.3B

Front

If Ernie travels 195 miles in 3 hours, how far will he travel in 5 hours?

Back

325 miles.

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CCSS.6.RP.A.3B

Front

What is the formula to find the speed?

Back

Speed = Distance ÷ Time.

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CCSS.6.RP.A.3B

Front

If Sara drives 330 miles in 5 hours, what is her rate?

Back

66 miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you determine which is the better buy?

Back

Calculate the unit price for each option and compare them.

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CCSS.6.RP.A.3B