Line GraphBar Graph

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Warm Up

Find the range for each set of data. Choose an appropriate set and interval for a frequency table

1. 8, 2, 6, 10, 3, 4

2. 10, 15, 0, 13, 13, 17, 5

3. 400, 1 200, 800, 900

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4. Give two examples of data that could be organized in a back-to –back stem-and–leaf plot. Why would you choose a stem-and-leaf plot?

5. Write the stems that would be used in a stem-and-leaf plot for each set of data.

44, 32, 77, 44, 31, 45, 79, 34, 35, 66, 55

Warm Up

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1. Observations gathered at the beginning stage constitutes the raw data.

2. Frequency denotes the number of times a particular observation occurs in a given data

3. The difference between the highest and lowest values of the observations is known as the range.

4. Frequency distribution is a table showing the frequencies of the various observations of a data.

5. Tally marks are used to find the frequencies when the number of observations is large.

Let’s summarize what we have learned in the last lesson

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6. When the number of observations is very large, the data is usually organized into groups called class intervals and the data obtained is called the grouped data.

7. The lower value of a class interval is called its lower limit and upper value of a class interval is called its upper limit.

8. The difference between the upper and lower class limits is called the width or size of the class interval.

9. The mid value of a class interval is called its class mark.

10. A Stem and Leaf Plot is a type of graph that summarizes the shape of a set of data (the distribution) and provides extra detail regarding individual values.

Recap

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11. The digits in the largest place is referred to as the stem and the digits in the smallest place are referred to as the leaf (leaves)

12. In an ordered stem and leaf plot, the leaves are arranged in ascending order from left to right.

13. An outlier is an extreme value of the data. It is an observation value that is significantly different from the rest of the data.

14. One can use a back to back stem and leaf plot while comparing two sets of data.

Recap

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Graph

Graphs are pictorial representation for a set of data ranges.

Graphs can be of different types. let us discuss

• Line graph• Bar graph

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Elements of a graph

Data Ranges:

• The graph is a pictorial interpretation of some data.

• The data Ranges are the data present in the spreadsheets.

• We can depict graph by selecting certain data called data Range

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Axes of a graph

x and y axes

• The x axis is the stuff that goes along the horizontal border of

the chart.

• The y axis is the vertical stuff.

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Upper and Lower Bounds

o Upper bound is the maximum limit for the graph

o Lower bound is the minimum limit for the graph

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Labels

• Data Representation on the Graph is Labels

• This will allow you to put informative data on the graph to make it easier to read.

• There will usually be an option for setting or changing the labels on a graph.

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Graph type

There are different options available to define data. But viewers perception is important to define type of graph

o Bar grapho Line grapho Pie chart

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Line graphs

A line chart plots the value of the variable as a specific point,

then 'connects the dots' in order to give you some idea of the relationship of consecutive points.

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Line graph

• A line graph is a way to summarize how two pieces of information are related and how they vary depending on one another.

• The numbers along a side of the line graph are called the scale.

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Simple example on line graph

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Let us draw Simple line graph.

Birds Count

Peocock 23

Myna 54

Eagle 66

Penguin 78

Crow 23

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Line graph

count

0

10

20

30

40

50

60

70

80

90

peocok myna eagle penguin crow

count

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Bar Graphs

Bar graphs consist of an axis and a series of labeled horizontal or vertical bars that show different values for each bar.

The numbers along a side of the bar graph are called the scale.

Bar graphs is also known as histograph.

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Bar charts

Bar charts compare distinct items or show single items at distinct intervals.

Bar charts are useful for comparing data items that are in competition,

so it makes sense to place the longest bars on top and the others in descending order beneath the longest one.

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Example on Bar Graph

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W.R.T Following data Plot Bar graph

Fruits Count

papaya 24

star fruit 23

mangoes 6

oranges 12

Apples 12

Count

0 10 20 30

papaya

star fruit

mangoes

oranges

Apples

papaya

star fruit

mangoes

oranges

Apples

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Snack Time

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LETS PLAY A GAME

Click Here to Play

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Your turn

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Below is the Data, draw line and Bar graph for this.

Mammal

Count

Bear 45

Fox 230

Wolf 87

Mink 134

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2.Bar Graph

Count

0 50 100 150 200 250

Bear

Fox

Wolf

Mink

Mink

Wolf

Fox

Bear

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2. Find the total number of mammals in the forest.

3. Calculate percentage of bears.

4. Calculate percentage of fox.

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5. Calculate percentage of wolf

6. Calculate percentage of mink.

7. Find the upper bound range in the graph

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8. Find lower bound range in the graph.

9. Which is the lowest value of mammals in the forest.

10. Find the highest value of mammals in the forest.

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1.Draw the line Graph

Event Registration

Monday 120%

Tuesday 40%

Wednesday

30%

Thursday 40%

Friday 80%

Average for week

62%

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2.Draw Bar graph for the following data

Waiting Time in Minutes

Number of Users Percentage

0-30 5 21

31-60 4 17

61-90 9 37

91-120 2 8

121-150 4 17

Total 24 100

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3. Draw Bar graph For the Above data.

and Calculate The Percentage of each Items

Internet 230

Cookery 345

Grocery 343

EB 123

Plumbing 129

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1. Graphs are pictorial representation for a set of data ranges.

2. Graphs can be of different types. Line graph and Bar graph

3. Data Representation on the Graph is Labels

4. This will allow you to put informative data on the graph to make it easier to read.

Lets recap what we have learned in this lesson

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Along a side of the bar graph are called the scale Bar graphs consist of an axis and a series of labeled horizontal or vertical bars that show different values for each bar

Bar graph

Line Graph

A line graph is a way to summarize how two pieces of information are related and how they vary depending on one another.

Review

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Remember to practice !!