Proportional Non-Proportional Equations Write

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

• Proportional

• Non-Proportional

Is the graph proportional?

• Yes

• No

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 equations that represent a proportional relationship.

• 
• 

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

Is the graph proportional?

• Yes

• No

Newtown middle school spends 11 dollars on every yearbook it buys. Is the amount of money NMS spends on yearbooks proportional to the total number of yearbooks NMS buys?

• Yes

• No

• 9.3

• 3

• 9

• 9.3x

Which equation shows a NON-proportional relationship of x and y?

• y = 5x

• y = 2.5x

• y = x + 3

• y = 1/2x