Proportionality

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

• y
• x
• 14

Write an equation for this situation.

• y=9.75x
• y=19x
• y=19.25x
• y=9.5x

Write an equation for this relationship.

• y=18x
• y=18.50x
• y=22.50x
• y=22x

Craig earns extra money as a lifeguard. He earns $37 for 4 hours and $64.75 for 7 hours.  What is the constant of proportionality? 

• $37
• $64.75
• $9.25
• $18.50

In order for a graph to represent a direct variation the line must be straight and go through the _________.

• y-axis
• origin
• x-axis
• 1st quadrant

Which graph is proportional?

• A
• B
• None of the graphs
• All of the graphs are proportional

What is the constant of proportionality for the table above?

• X 2

• X 1/2

• X 3

• None of the above

REVIEW QUESTION
Is this table proportional or non-proportional?

• Proportional
• Non-Proportional

What is the constant of proportionality? 

• 5
• 1/5
• 10
• 2

What is the constant of proportionality? 

• 15
• 2/15
• 7.5
• 2