Proportional and Nonproportional Graphs

Proportional or Nonproportional

• Proportional

• NonProportional

What is the constant of proportionality?

• It is the x-axis on a graph.

• It is the same as the unit rate.

• It is a repeating decimal.

• It is the same as the origin.

Which best describes the equation?
y = 75x

• Proportional

• Nonproportional

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

Is the graph proportional?

• Yes

• No

These two lines are graphs of nonproportional relationships. What makes them nonproportional?

• They are not straight

• They are not linear

• They do not go through the origin

• They do not show a constant rate of change

Identify whether the graph represents a  proportional or non-proportional relationship.

• Proportional Relationship

• Non-Proportional Relationship

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

Which graph is non-proportional?

• A

• B

• C

• D

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional