1. Warm Up Write each fraction as a decimal. 1. 2. 3. 4. 0.4 0.060.7 Course 3 9-5 Displaying Data 0.98 2525 49 50 3 50 7 10

2. Problem of the Day Your job at the local library is to shelve the returned books. To correctly put the books on the shelves, you need to arrange them in order according to their numbers. Which order is correct? C Course 3 9-5 Displaying Data A. 342.3, 342.5, 342.48, 342.52 B. 342.21, 342.47, 342.4, 342.59 C. 342.1, 342.17, 342.56, 342.76 D. 342.34, 342.43, 342.567, 342.56

3. Learn to display data in bar graphs, histograms, and line graphs. Course 3 9-5 Displaying Data TB P. 485-488

4. Vocabulary double-bar graph frequency table histogram double-line graph Insert Lesson Title Here Course 3 9-5 Displaying Data

5. Course 3 9-5 Displaying Data A double-bar graph is used to display and compare two sets of data. You can organize data using a frequency table by listing items according to the number of times the items occur.

6. Additional Example 1: Displaying Data in a Double-Bar Graph Course 3 9-5 Displaying Data Make a double-bar graph. The following are the number of books read in one month by some boys and girls in Grade 8. Books read012345 Boys233101 Girls212410

7. Additional Example 1 Continued Course 3 9-5 Displaying Data Make a double-bar graph. Frequency Books read The frequencies are the heights of the bars in the graph. Use a different color to represent each gender.

8. Course 3 9-5 Displaying Data A histogram is a bar graph that shows the frequency of data within equal intervals.

9. Additional Example 2: Displaying Data in a Histogram Course 3 9-5 Displaying Data Jimmy surveyed 12 children to find out how much money they received from the tooth fairy. Use the data to make a histogram. 0.35 2.00 0.75 2.50 1.50 3.00 0.25 1.00 1.00 3.50 0.50 3.00 First, make a frequency table with intervals of $1.00. Then make a histogram.

10. Additional Example 2 Continued Course 3 9-5 Displaying Data 0.35 2.00 0.75 2.50 1.50 3.00 0.25 1.00 1.00 3.50 0.50 3.00 33.00 – 3.99 22.00 – 2.99 31.00 – 1.99 40 – 0.99 FrequencyMoney ($)

11. Additional Example 2 Continued Course 3 9-5 Displaying Data Histograms do not have spaces between the bars. Helpful Hint Frequency

12. Course 3 9-5 Displaying Data A double-line graph is used to show how two related sets of data change over time.

13. Course 3 9-5 Displaying Data Additional Example 3: Displaying Data in a Double-Line Graph Make a double-line graph of the given data. Use the graph to estimate the number of CDs and DVDs sold in 2003. The Music Shop CD and DVD Sales YearCD’s SoldDVDs Sold 19983002735 200030981057 200246853010 200458044047

14. Course 3 9-5 Displaying Data Additional Example 3 Continued Plot the data. The graph shows about 5,250 CDs and 3,500 DVDs were sold in 2003. The Music Shop CD and DVD Sales Number Sold Year

15. Lesson Quiz: Part I 1. Make a histogram with intervals of 5 using the following data set: 7, 12, 8, 4, 4, 3, 6, 1, 14, 19, 8, 9 Insert Lesson Title Here Course 3 9-5 Displaying Data 0-4 5-9 10-14 15-19 8765432187654321 Frequency UnitsFrequency 0-44 5-95 10-142 15-191

16. Lesson Quiz: Part II 2. Estimate the temperature on January 6 in 2004 and 2005 using the graph below. Insert Lesson Title Here Course 3 9-5 Displaying Data 2005: 31°C, 2004: 30°C

17. Lesson Quiz: Part III Use the graph for problems 3–4. Monday, Wednesday, Thursday, and Saturday Friday Insert Lesson Title Here Course 3 9-5 Displaying Data 3. On what day did both girls exercise for 30 minutes? 4. On what day(s) did Ana exercise longer than Sue?