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					                  Warm Up
•   ENTERTAINMENT use the data below. It shows the
    gross collected during several Broadway seasons.
       Broadway Season Earnings
       Year                  Earnings
                             ($ million)
       1997–1998             558
       1998–1999             588
       1999–2000             603
       2000–2001             666
1. Make a scatter plot of the data
2. Use your scatter plot to predict about how much
   money a Broadway season will gross in 2005–
   2006, if the trend continues.
     Lesson 2-3 Notes:

           Line Plots

           Objective:
Construct and interpret line plots
 Vocabulary


• A line plot is a diagram that shows the
  frequency of data on a number line
Example
Make a Line Plot
1. BUILDINGS
   Make a line plot of
   the data shown
     Step 1
     Draw a number line
     Step 2
     Put an X above the
     number that represents
     the number of
     stories in each
     building
       Make some observations about the
             distribution of data




The range of the data, is the difference between
 the greatest and least numbers in the data set
Example
Use a Line Plot to Analyze Data
2. SHOES The line plot below shows prices for different basketball
   shoes. What is the range of the data?
   The greatest price is $100, and the lowest price is $30.
        Range: 100–30 or 70
        The range of the prices is $70.

3. Identify any clusters, gaps, and outliers in the data in Example 2 and
    explain what they mean
         Many of the data cluster around $75.

        You could say that most of the shoes cost from $70 to $85.

        There is a gap from $30 to $50, so there were no shoes in this price
        range.

        The number 30 appears removed from the rest of the data, so it
        could be considered an outlier. This means that $30 is an extremely
        low price and not representative of the whole data set.
              On Your Own
a. Identify the range of the data in Example 1




Range: 73 – 17 = 56
The range of the stories is 56.

				
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