Representations of Proportional and Non-Proportional Relationships

Bob has $150 in his savings account and saves $40 per month.  Which equation represents the amount Bob has in his account after x months?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

Proportional or Non-Proportional?

• Proportional

• Non-Proportional

Proportional or Non-Proportional:
The video game rental fee is $15 plus $3 per day. 

• Proportional

• Non-Proportional

• y = 1/5x

• y = 5x

• y = 1/2x

Is the graph proportional?

• Yes

• No

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

Select all graphs that represent proportional relationships.

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Select all graphs that represent a proportional relationship.

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Select all tables that represent a proportional relationship.

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