FREQUENCY TABLES AND LINE GRAPHS

1. FREQUENCY TABLES AND LINE GRAPHS CONFIDENTIAL

2. FREQUENCY TABLES CONFIDENTIAL

3. Review • Arrange the following numbers in ascending order: a) 145,140,150,149,142,147,141,146,151,148 Arrange the following numbers in descending order: a) 90,75,80,65,78,55,56, 77,86,68,74,79,91 CONFIDENTIAL

4. FREQUENCY TABLES • A frequency table is a table that lists each item in a data set with the number of times the item occurs. CONFIDENTIAL

5. Frequency tables • We use tally marks to represent the number of repeated items. • Tally mark is denoted by a vertical line • For example: 3 = and 5 = CONFIDENTIAL

6. Shapes Triangles square circle square square triangle circle triangle square square Frequency tables The frequency table is: CONFIDENTIAL

7. EXAMPLE: Frequency tables • ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ • ○∆ ⌂○ □∆ ⌂□ ∆□○ • ⌂ ○∆ ⌂ □ □∆ ○○□ • ∆ ⌂ □ □ □ ⌂ ⌂○ □ Total 40 CONFIDENTIAL

8. Now your turn!!! • The salary of 24 people in my neighborhood (in $ thousands): • 25 26 30 25 26 28 28 28 28 25 25 30 30 25 30 30 28 25 30 27 30 29 29 28 Using tally marks, make a frequency distribution table. CONFIDENTIAL

9. Monday Tuesday Wednesday Thursday Friday More Problems • The following table shows the number of TV’s sold by a shopkeeper during a week. Prepare a frequency table. CONFIDENTIAL

10. LINE GRAPHS CONFIDENTIAL

11. Line Graphs • A line graphuses a series of line segment to show changes in data. CONFIDENTIAL

12. 80 Making a Line graph TEMPERATURE 75 70 65 60 55 50 8 AM 10AM 12PM 2 PM 4 PM 6 PM 8 PM TIME OF DAY CONFIDENTIAL

13. More Examples 15 N U M B E R S 13 11 Convert the frequency table into a line graph: 9 7 5 Apple Orange Mango Pear Fruits CONFIDENTIAL

14. Solve the puzzle http://www.thekidzpage.com/onlinejigsawpuzzles/kids-jigsaw-puzzles/12-piece-jigsaw/12-27-06-puppydog.html CONFIDENTIAL

15. Time for a break! CONFIDENTIAL

16. Now your turn Convert the given frequency table into line graph CONFIDENTIAL

17. More practice problems • Prepare a frequency table and then draw a line graph with this observations: 145, 150, 142, 144, 147, 150, 148,147,149,151, 149, 144, 150, 146,148,150,149,144, 151, 148,147,146, 151,149,150,140,146,147,150,151. CONFIDENTIAL

18. Assignment • The following table gives birth-days of 40 boys in a class. Illustrate the data by a line graph. CONFIDENTIAL

19. Review • A frequency table is a table that lists each item in a data set with the number of times that occurs. • A line graph uses a series of line segments to show changes in data. CONFIDENTIAL

20. That’s all for today!!! You did a good job! CONFIDENTIAL