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Warm Up

Warm Up. Problem of the Day. Lesson Presentation. Lesson Quizzes. Warm Up Write each fraction as a decimal. 1. 2. 3. 4. 49 50. 2 5. 0.4. 0.98. 7 10. 3 50. 0.06. 0.7. Problem of the Day

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Warm Up

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  1. Warm Up Problem of the Day Lesson Presentation Lesson Quizzes

  2. Warm Up Write each fraction as a decimal. 1. 2. 3.4. 49 50 2 5 0.4 0.98 7 10 3 50 0.06 0.7

  3. 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

  4. Learn to display data in bar graphs, histograms, and line graphs.

  5. Vocabulary double-bar graph frequency table histogram double-line graph

  6. 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.

  7. 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.

  8. Frequency Books read Additional Example 1 Continued Make a double-bar graph. The frequencies are the heights of the bars in the graph. Use a different color to represent each gender.

  9. 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.

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

  11. A histogram is a bar graph that shows the frequency of data within equal intervals.

  12. 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.

  13. 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

  14. Frequency Helpful Hint Histograms do not have spaces between the bars. Additional Example 2 Continued

  15. 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.

  16. 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

  17. Hours Spent at Day Care 5 4 Frequency 3 2 1 0 0:00 to 0:31 to 1:01 to 1:31 to 2:01 to 2:31 to 0:30 1:00 1:30 2:00 2:30 3:00 Check It Out: Example 2 Continued

  18. A double-line graph is used to show how two related sets of data change over time.

  19. 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

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

  21. 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

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

  23. Lesson Quizzes Standard Lesson Quiz Lesson Quiz for Student Response Systems

  24. Lesson Quiz: Part I 1. Make a double-bar graph.

  25. Lesson Quiz: Part II 2. Make a histogram with intervals of 5 using the following data set: 7, 12, 8, 4, 4, 3, 6, 1, 14, 19, 8, 9

  26. Lesson Quiz: Part III 3. Estimate the temperature on January 6 in 2004 and 2005 using the graph below. 2005: 31°F, 2004: 30°F

  27. Lesson Quiz for Student Response Systems 1. Estimate the rainfall on December 8 in 2003 and 2005 using the graph below. A.2003: 3.5 in.; 2005: 2 in. B.2003: 2 in.; 2005: 3.5 in. C. 2003: 3.5 in.; 2005: 3.5 in. D. 2004: 2 in.; 2005: 2 in.

  28. Lesson Quiz for Student Response Systems 2. Use the graph to identify the days on which toy trucks were sold more than toy trains. A.Mon, Fri B.Tues, Weds, Thurs C. Mon, Thurs D. Tues, Weds, Fri

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