Variable Relationships Tables and Graphs

What is the constant of proportionality for the following graph?

• 80

• 20

• 40

• 160

Which graph represents a proportional relationship between x and y?

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• 
• 
• 

Which table shows a proportional relationship between the distances on a map and the actual distances?

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• 
• 
• 

According to the graph, what would be the cost of one ticket?

• $25

• $35

• $50

• $60

Using the data in the table above, how much does 1 gallon of gas cost?

• $3.50

• $4.00

• $4.50

• $5.00

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $200 earned for every 2 hours worked
  is the unit rate

• $500 is earned for every 8 hours worked

• $200 is earned after working 3 hours

What is the unit rate for the rain fall?

• 2 cm per hour

• 1 cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

The "Distance from Home" (miles) is best described as:

• on the x-axis

• the dependent variable

• the independent variable

• both a & c

Which table shows the relationship between x and y as a direct variation?

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• 
• 
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The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2