Introduction to Proportional Relationships

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Which graph is proportional?

• A

• B

• None of the graphs

• All of the graphs are proportional

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

What is the constant of proportionality? 

• 28

• 35

• 38

• 26

Is this table proportional?

• Yes

• No

Write the equation that shows the relationship between the gallons, g, and t the time.

• g = 1t

• t = 1g

• t = 5g

• g = 5t

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

Select all equations that represent a proportional relationship.

• 
• 

The graph above shows the price of games in dollars.  Is the graph proportional and how do you know?

• The graph is proportional  because it is linear.

• The graph is proportional because it is linear and passes through the origin.

• The graph is not proportional because it does not pass through the origin.

• The graph is not proportional because it is not linear and it does not pass through the origin.

Use the shapes in the picture to write the ratio of STARS to SQUARES.

• 3 to 2

• 2 to 4

• 4 to 2

• 3 to 4