Is It Proportional Equations

Which graph is non-proportional?

• A

• B

• C

• D

Why does this graph show a non-proportional relationship?

• Because it is proportional

• It goes through the origin

• It does not go through the origin

• It is a straight line

• y = 1/5x

• y = 5x

• y = 1/2x

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

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

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x

Select all equations that represent proportional relationships.

• 
• 

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

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

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