Proportional Relationships from Table and Graphs

The cost of popcorn is $2.50 for each bag.

• Proportional

• Nonproportional

Is this graph proportional or non-proportional?

• Proportional

• Non-Proportional

Using the equation \frac{y}{x} determine the constant of proportionality of the table. (Select ONE answer)

• 9

• (3, 27)

• 18

• 0

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.

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

On your own piece of paper- graph the ordered pairs from the table and determine if the graph is proportional or not.

• This table is proportional

• This table is not proportional

Select all the ways you can determine if a graph is proportional.

• It is in a straight line

• It goes through the origin

• It goes up and over (or down and back) the same amount every time

• All graphs are proportional

What number is missing in the table?

Which of the following tables represents a proportional relationship?

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