Ratios and Proportions Flashcard

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, 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 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 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

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find the unit rate from a total?

Back

To find the unit rate, divide the total amount by the number of units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does it mean for a graph to be proportional?

Back

A graph is proportional if it is a straight line that passes through the origin (0,0).

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CCSS.7.RP.A.2D

Front

What is the formula for finding a unit rate?

Back

Unit Rate = Total Amount / Number of Units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If Naveena earned $20.40 in 3 hours, what is her unit rate?

Back

$6.80 per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the significance of the origin in proportional relationships?

Back

The origin (0,0) indicates that when one quantity is zero, the other quantity is also zero, showing a direct relationship.

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CCSS.7.RP.A.2D

Front

How can you tell if two ratios form a proportion?

Back

Two ratios form a proportion if their cross products are equal.

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CCSS.7.RP.A.2A