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**FREQUENCY TABLES AND LINE GRAPHS**

CONFIDENTIAL

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FREQUENCY TABLES CONFIDENTIAL

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**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

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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

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**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

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**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

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**Frequency tables ∆ ○⌂ ⌂ ∆□ ∆○ ∆ ⌂ ○∆ ⌂○ □∆ ⌂□ ∆□○ ⌂ ○∆ ⌂ □ □∆ ○○□**

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

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**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

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**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

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LINE GRAPHS CONFIDENTIAL

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

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**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

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**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

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Solve the puzzle CONFIDENTIAL

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Time for a break! CONFIDENTIAL

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**Now your turn Convert the given frequency table into line graph Snack**

Numbers Sandwich 15 Chips 26 Samosa Cake 7 CONFIDENTIAL

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**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

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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

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**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

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

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