Solving Proportional Relationship Problems

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

Is the graph proportional?

• Yes

• No

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

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

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x

Is the graph proportional?

• Yes

• No

For each situation, explain whether you think the relationship is proportional or not. Explain your reasoning. The weight of a stack of standard 8.5x11 copier paper vs. number of sheets of paper.

• There is a proportional relationship.

• There is not a proportional relationship.

• Yes, they are proportional.

• No, they are not proportional.

For each situation, explain whether you think the relationship is proportional or not. Explain your reasoning. The weight of a stack of different-sized books vs. the number of books in the stack.

• There is a proportional relationship.

• There is not a proportional relationship.