1. EXAMPLE 1 Choosing an Appropriate Data Display ANSWER Either a box-and-whisker plot or a histogram will show how the data are distributed without showing individual data. A professional bowler wants to display his scores for the year, without displaying individual data. What data display(s) should he use? Bowling

2. EXAMPLE 2 Identifying Misleading Data Displays Advertising Is the advertisement potentially misleading? Explain.

3. EXAMPLE 2 The graph could be misleading because there is a break in the scale on the vertical axis, as it jumps from 0 to 50. The graph indicates a significant rise in sales. However, this rise would look less impressive if the vertical axis did not have a break in the scale. SOLUTION Identifying Misleading Data Displays

4. GUIDED PRACTICE for Examples 1 and 2 Car Dealership 1. A car dealership sells seven makes of cars. Which data display(s) could be used to compare sales for each make of car last year? ANSWER A bar graph, since the different makes of cars are distinct categories.

5. GUIDED PRACTICE 2. Profits A store wants to display profits for this quarter. Which type of data display(s) could be used to compare this quarter’s profits to last quarter’s profits? ANSWER A line graph, since it shows data over time. for Examples 1 and 2

6. GUIDED PRACTICE 3. What If? Suppose you redraw the line graph in Example 2 with a scale from 0 to 60 using increments of 10. How does it compare with the graph in Example 2 ? ANSWER Sample Answer: The graph in Example 2 appears to show a significant rise in sales. The graph without the break and small increments shows a less impressive rise. for Examples 1 and 2