Example 2 During the 2005-2006 hockey season, the Oilers advanced to the Stanely Cup final. In regular season play, two of their top three players were Shawn Horcoff, (from Trail), and Jarret Stoll (from SK). Here are the statistics for their previous three regular season with the Oilers (fig. page 10) 


a) 
Use a double bar graph to display the data. 


b) 
Which player shows the most improvement in total points? 


c) 
Total points are used to assess a player’s worth. Take a look at the number of games Horcoff and Stoll played. Is this a fair way to assess a player’s worth? 


Flora wants to use a graph to summarize movie ticket sales for two movies, and make a prediction for future sales. Which graph should she use – the double line graph or the double bar graph? Explain why? 


8 


5 6 


4 3 

4 



Top 

Pirates 


2 

2 


Speed 
1 0 



0 


Pirates 
Top Speed 

Week 1 
Week 2 
Week 3 
Week 4 
Week 5 
Week 6 


Week 1 
Week 2 
Week 3 
Week 4 
Week 5 
Week 6 


 


Wes surveyed 60 students to determine which type of computer game is the most popular. Wes decided to display the data in a bar graph. Bonnie suggested that a circle graph would be more useful for displaying the data. Who made the better choice? Explain Type of Game Votes Quest 15 Role-play 20 Simulation 9 Strategy 16 Total 60 


How are a bar graph and a pictograph similar? How are they different? What type of data is each useful for displaying? 


 
Bar Graph 
Pictograph 
Similar 
Different 
When is it useful?