Constant of proportionality

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CCSS.7.RP.A.2B

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A speedboat travels 18 miles in 12 minutes. What is the speed of the speedboat in miles per hour?

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90

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CCSS.6.RP.A.3B

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What makes a graph proportional?

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A straight line (linear) that goes through the origin.

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CCSS.7.RP.A.2D

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Theresa rode her bike 44 miles in 8 minutes. What is the constant of proportionality for the amount of miles per minute?

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5.5

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CCSS.7.RP.A.2B

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Which equation have we been using to find the constant of proportionality (unit rate)?

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CCSS.7.RP.A.2B

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Define the constant of proportionality.

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CCSS.7.RP.A.2B

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If the constant of proportionality is 3, what is the value of y when x = 4?

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y = 12 (since y = 3 * 4).

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CCSS.7.RP.A.2B

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What is the unit rate?

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The unit rate is the constant of proportionality expressed as a quantity per one unit of another quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you find the constant of proportionality from a table of values?

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Divide the value of y by the corresponding value of x for any pair of values.

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CCSS.7.RP.A.2B

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What does a proportional relationship look like on a graph?

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It appears as a straight line that passes through the origin.

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CCSS.7.RP.A.2D