1. FREQUENCY TABLES AND LINE GRAPHS
CONFIDENTIAL

2. FREQUENCY TABLES
CONFIDENTIAL

3. Review Arrange the following numbers in ascending order:
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. We use tally marks to represent the number of repeated items.
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. Frequency tables square triangle circle Triangles Shapes Shapes Tally
The frequency table is:
Shapes
Tally
Number
Triangle
III 3
Square
IIII 4
Circle II 2
CONFIDENTIAL

7. Frequency tables ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ ○∆ ⌂○ □∆ ⌂□ ∆□○ ⌂ ○∆ ⌂ □ □∆ ○○□
EXAMPLE:
Shapes
Tally
frequency
Circle
IIII IIII 9
pentagon 10
Square
IIII IIII I 11
Triangle
∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂
○∆ ⌂○ □∆ ⌂□ ∆□○
⌂ ○∆ ⌂ □ □∆ ○○□
∆ ⌂ □ □ □ ⌂ ⌂○ □
Total 40
CONFIDENTIAL

8. The salary of 24 people in my neighborhood (in $ thousands):
Now your turn!!!
The salary of 24 people in my neighborhood (in $ thousands):
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.
Friday
Thursday
Wednesday
Tuesday
Monday
CONFIDENTIAL

10. LINE GRAPHS
CONFIDENTIAL

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

12. Making a Line graph Temperatures through out the day Time Temperature
8 A.M
50 F
10 A.M
60 F
12 P.M
70 F
2 P.M
80 F
4 P.M
75 F
6 P.M
8 P.M
55 F 80
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 Fruit Numbers Apple 9 Orange 4 Mango 15 Pear 13
Convert the frequency table into a line graph: 15 N U M B E R S
Fruit
Numbers
Apple 9
Orange 4
Mango 15
Pear 13 13 11 9 7 5
Apple
Orange
Mango
Pear
Fruits
CONFIDENTIAL

14. Solve the puzzle
CONFIDENTIAL

15. Time for a break!
CONFIDENTIAL

16. Now your turn Convert the given frequency table into line graph Snack
Numbers
Sandwich 15
Chips 26
Samosa
Cake 7
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.
Days
sunday
monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Number of boys 6 7 3 8 11 2
CONFIDENTIAL

19. A line graph uses a series of line segments to show changes in data.
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