Proportional Relationship in Graphs and Charts

As a school carnival, tickets can be purchased to participate in different activities. The table shows the total cost for different numbers of tickets. What is the constant of proportionality that relates, y the total cost in dollars to x, the number of tickets purchased?

• 4.00

• 0.25

• 1.00

• 0.10

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

• $300 is earned after working 4 hours

What is the constant of proportionality of the relationship represented by the table above?

• 75

• 0.013

• 1/75

• None of the above

What is the constant of proportionality? 

• 45 mph

• 90 mph

• 135 mph

• 2 mph

The table below shows the relationship between the number of miles traveled, x, and the number of gallons of gas used, y. Which of the following equations best represents the relationship?

• 35 = 1x

• y = 35x

• y=3.5x

The graph shows the amount of money that Janice saves each week from her summer job. Which equation best represents the graph?

• y = 100x + 200

• y = 200x + 100

• y = 200x + 150

• y = 150x + 200

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

• x

• 14

• y

• y = 1/5x

• y = 5x

• y = 1/2x

Is the graph proportional?

• Yes

• No

Select all graphs that represent a proportional relationship.

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