Identifying Proportional and Non-Proportional Relationships

Does this graph represent a proportional relationship?  

• No, because it doesn't pass through the origin.

• Yes, because it doesn't pass through the origin.

• Yes, because it intersects the y axis.

• No, because it intersects the x axis.

Does the equation show a proportional relationship?

• Yes

• No

Which best describes this equation?
y= 3.75x + 2

• Proportional 

• Non-proportional

Which of the following is NOT proportional?

• y = 2x 

• y = 3x + 9

• y = x

• y = -x

In order for a graph to be proportional it must pass through the .....

• graph

• origin

• y-axis

• line

Which statement best describes the graph?

• Proportional: It goes through the origin.

• Proportional: It goes through the origin and is a straight line.

• Not Proportional:

What are the TWO important characteristics a graph needs to have to be considered Proportional?

• It needs to be a straight line

• The line needs to pass through the origin

• The line CANNOT pass through the origin

• The line CANNOT be a straight line.

Is this graph proportional or non-proportional?

• Proportional

• Non-Proportional

This graph is NOT proportional. What would MAKE it be proportional? (What requirement is it missing?)

• The line needs to be straighter.

• The line needs to start at the origin (0,0)

Is this graph proportional or not proportional?

• Proportional

• Non-proportional