
Directions: Read each problem carefully!
1. 
Does the table shown at the right demonstrate a proportional relationship?
Explain.




2. 
The perimeter of a regular pentagon can be represented by the equation P = 5s, where P is the perimeter and s is the length of a side.
Does this equation represent a proportional relationship?
Explain. 
In a regular pentagon,
all of the sides are
of the same length.

Choose:


3. 
Does the table shown at the right demonstrate a proportional relationship?
Explain. 



4. 
Examine the graph at the right.
a) Explain why this graph displays a proportional relationship? 


b) If r = unit rate, explain the meaning of (1, r). 

c) What is the constant of proportionality? 



5. 
Two model helicopters take off at the same time. Helicopter A rises 5 meters every 2 seconds. Helicopter B rises 4 meters every 3 seconds.
a) Fill in the missing ordered pairs on the coordinate graph at the right for each helicopter.



b) Does the rise of each helicopter represent a proportional relationship? Explain.


c) Using ratios, explain why helicopter A is rising faster than helicopter B.


d) State the constant of proportionality associated with the rise of each helicopter.


6. 
Carley ordered 10 bottles of WaZo Colored Hair Spray for $50.60. Which of the following equations represents the proportional relationship between y, the total cost of the hair spray and x, the number of bottles ordered? 




A line passing through unknown point A and plotted point B represents a proportional relationship.
If point B lies at (8,6), which of the ordered pairs shown below, could represent the coordinates of point A?
Choose:



8. 
The number of chaperons on a field trip is proportional to the number of students, as shown in the table at the right. 


Which of the following choices represents the values for A, B and C, in that order?
Choose:


9. 
The graph at the right shows the relationship between xvalues and yvalues in a given situation. Which of the following choices is the constant of proportionality for this graph?
Choose:



10. 
Which of the following choices represents the constant of proportionality associated with walkers A and B, in that order?
(Dots indicate locations of grid intersections.)




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