9-5 Displaying Data Warm Up Problem of the Day Lesson Presentation Course 3

9-5 Displaying Data Warm Up Write each fraction as a decimal. 1. 2. Course 3 9-5 Displaying Data Warm Up Write each fraction as a decimal. 1. 2. 3. 4. 2 5 49 50 0.4 0.98 3 50 7 10 0.06 0.7

9-5 Displaying Data Problem of the Day Course 3 9-5 Displaying Data 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 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

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

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

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.

Additional Example 1: Displaying Data in a Double-Bar Graph Course 3 9-5 Displaying Data Additional Example 1: Displaying Data in a Double-Bar Graph 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 read 1 2 3 4 5 Boys Girls

Additional Example 1 Continued Course 3 9-5 Displaying Data Additional Example 1 Continued 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.

9-5 Displaying Data Check It Out: Example 1 Make a double-bar graph. Course 3 9-5 Displaying Data Check It Out: Example 1 Make a double-bar graph. The following are the number of tickets sold in one week by the boys and girls in Grade 8. Tickets Sold 5 10 15 20 25 Boys 3 9 8 2 Girls 4 6

Check It Out: Example 1 Continued Course 3 9-5 Displaying Data Check It Out: Example 1 Continued Make a double-bar graph. Frequency Tickets Sold The frequencies are the heights of the bars in the graph. Use a different color to represent each gender.

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

Additional Example 2: Displaying Data in a Histogram Course 3 9-5 Displaying Data Additional Example 2: Displaying Data in a Histogram 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.

Additional Example 2 Continued Course 3 9-5 Displaying Data Additional Example 2 Continued 0.35 2.00 0.75 2.50 1.50 3.00 0.25 1.00 1.00 3.50 0.50 3.00 Money ($) Frequency 0 – 0.99 4 1.00 – 1.99 3 2.00 – 2.99 2 3.00 – 3.99 3

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

9-5 Displaying Data Check It Out: Example 2 Course 3 9-5 Displaying Data Check It Out: Example 2 Tonya surveyed 14 children at an after school day care to find out how many hours they spend there. Use the data to make a Histogram. 2:00 1:40 3:00 0:30 1:00 1:30 2:30 0:30 2:45 1:00 2:00 1:35 1:30 3:00 First, make a frequency table with intervals of 30 minutes. Then make a histogram.

Check It Out: Example 2 Continued Course 3 9-5 Displaying Data Check It Out: Example 2 Continued 2:00 1:40 3:00 0:30 1:00 1:30 2:30 0:30 2:45 1:00 2:00 1:35 1:30 3:00 Time Spent at Day Care Frequency 0:00 to 0:30 2 0:31 to 1:00 1:01 to 1:30 1:31 to 2:00 4 2:01 to 2:30 1 2:31 to 3:00 3

Check It Out: Example 2 Continued Course 3 9-5 Displaying Data Check It Out: Example 2 Continued Frequency Hours Spent at Day Care 1 2 3 4 5 0:00 to 0:30 0:31 to 1:00 1:01 to 1:30 1:31 to 2:00 2:01 to 2:30 2:31 to 3:00

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

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 Year CD’s Sold DVDs Sold 1998 3002 735 2000 3098 1057 2002 4685 3010 2004 5804 4047

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

9-5 Displaying Data Check It Out: Example 3 Course 3 9-5 Displaying Data Check It Out: Example 3 Make a double-line graph of the given data. Use the graph to estimate the number of Strawberries and Figs grown in 2002. Perry's Strawberry-Fig Farm Sales Year Strawberry Baskets Sold Figs Sold 1999 4,000 1,200 2001 4,500 2,000 2003 8,000 3,500 2005 5,500 3,200

9-5 Displaying Data Check It Out: Example 3 Continued Plot the data. Course 3 9-5 Displaying Data Check It Out: Example 3 Continued Plot the data. Perry’s Strawberry-Fig Farm Sales Number Sold Year The graph shows about 6,250 Strawberry Baskets and 2,800 Figs were sold in 2002.

Insert Lesson Title Here Course 3 9-5 Displaying Data Insert Lesson Title Here 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 0-4 5-9 10-14 15-19 8 7 6 5 4 3 2 1 Frequency Units Frequency 0-4 4 5-9 5 10-14 2 15-19 1

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

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