Graphs of a Proportional Relationship

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional

• y = 1/5x

• y = 5x

• y = 1/2x

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

Is the graph proportional?

• Yes

• No

Select all graphs that represent a proportional relationship.

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• 

Write the equation of the proportional relationship using the format y = kx.

What is the constant of proportionality? Use the format k = 2.

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

Does this graph represent a proportional relationship?

• Yes

• No

The graph above shows the price of games in dollars.  Is the graph proportional and how do you know?

• The graph is proportional  because it is linear.

• The graph is proportional because it is linear and passes through the origin.

• The graph is not proportional because it does not pass through the origin.

• The graph is not proportional because it is not linear and it does not pass through the origin.