Proportional Relationships and Equations

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x

Write an equation for the relationship between x and y. Use format y = kx.

Select all graphs that represent a proportional relationship.

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What is the constant of proportionality? Use the format k = 4.

Write the equation of the graph. Use the format y = kx.

Is the graph proportional?

• Yes

• No

Is the given table a proportional relationship? If so, write an equation that relates y to x.

• Yes;  y=1/3x

• Yes;  y=3x

• Yes;  y=5x 

• No

Which best describes the equation?
y = 75x

• Proportional

• Nonproportional

Does the table show a proportional relationship? 

• Yes, COP = 7

• Yes, COP  = 0.7

• Yes, COP = 0.14

• Yes, COP = 14/100

Does this equation represent a proportional relationship?

• Yes

• No