Proportional Relationships and Constants of Proportionality

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

What makes a graph proportional?

• Linear

• The line goes through the origin

• Curvy line

• Linear and the line goes through the origin

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

Which line shows a proportional relationship between x and y?

• Line L

• Line M

Determine which equation does NOT represent a proportional relationship.

• y = -2x

• y = 1/2 x

• y = 3x

• y = 5x - 7

Heather is creating towers of nickels and measuring the height, in millimeters, of the stacks. Her data is shown in the table.

Is the height of a tower proportional to the number of nickels?

• no, the height is not proportional to the number of nickels

• yes, the height is proportional to the number of nickels

• unable to determine if the height is proportional to the number of nickels

Tags

8.EE.6

What is the constant of proportionality from the table? Report the answer in a reduced fraction.

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8.EE.6

What is the constant of proportionality of this table? Choose all equivalent values.

• 2.5

• 0.4

• this is not a proportional relationship; no constant exists

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8.EE.6

Match the following constants of proportionality to the phrase.

• k = 5/3

• 1 y for every 2 x's

• k = 1/2

• 3 y's for every 1 x

• k = 9/3

• 5 x's for every 3 y's

• k = 3/5

• 3 x's for every 5 y's

• k = 2

• 6 y's for every 3 x's

When ratios are equivalent, they are proportional. Choose the best answer.

• TRUE

• SOMETIMES

• FALSE

• ONLY WITH UNIT RATES

Tags

8.EE.6