5.2 Warm Up

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 can you determine if two rates form a proportion?

Back

To determine if two rates form a proportion, you can cross-multiply and see if the products are equal.

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CCSS.7.RP.A.2A

Front

What does it mean if two rates do not form a proportion?

Back

If two rates do not form a proportion, it means that the ratios are not equivalent.

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CCSS.6.RP.A.3A

Front

Give an example of two rates that form a proportion.

Back

Example: 1/2 and 2/4 form a proportion because 1 * 4 = 2 * 2.

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CCSS.7.RP.A.2A

Front

Give an example of two rates that do not form a proportion.

Back

Example: 1/3 and 2/5 do not form a proportion because 1 * 5 ≠ 2 * 3.

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CCSS.7.RP.A.2A

Front

What is cross-multiplication?

Back

Cross-multiplication is a method used to determine if two fractions are equal by multiplying the numerator of one fraction by the denominator of the other.

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CCSS.4.NF.A.2

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the relationship between ratios and proportions?

Back

Proportions are equations that show that two ratios are equal.

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CCSS.6.RP.A.3A

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that has the same value when simplified.

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CCSS.6.RP.A.3A

Front

How can you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2