Constant of Proportionality

Front

What is the constant of proportionality?

Back

The constant of proportionality is the unit rate that describes the relationship between two proportional quantities.

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CCSS.7.RP.A.2B

Front

How do you find the unit rate?

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

If a box of cereal costs $3.59 for 30 oz, what is the unit rate per ounce?

Back

12 cents per ounce.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does a proportional relationship look like on a graph?

Back

A proportional relationship is represented by a straight line that passes through the origin.

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CCSS.7.RP.A.2D

Front

What is the equation for a proportional relationship?

Back

The equation is in the form y = kx, where k is the constant of proportionality.

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CCSS.7.RP.A.2C

Front

If 624 calories are in 3 servings, what is the unit rate of calories per serving?

Back

208 calories per serving.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the difference between proportional and non-proportional relationships?

Back

Proportional relationships have a constant ratio, while non-proportional relationships do not.

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CCSS.7.RP.A.2D

Front

How can you determine if a table of values represents a proportional relationship?

Back

If the ratios of corresponding values are constant, it represents a proportional relationship.

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CCSS.7.RP.A.2A

Front

What is an example of a proportional relationship in real life?

Back

The cost of gas per gallon is a proportional relationship; as you buy more gallons, the total cost increases at a constant rate.

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CCSS.7.RP.A.2A

Front

What is the unit rate of 18.50 for 1 item?

Back

18.50 is the unit rate for 1 item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2