Graphs - Bar Graphs - video Dailymotion

GenX-Education

7/27/2024

Transcript

00:00Hi kids! Today we will learn what are data charts, their types, features, and how we use them.

00:10So let's start!

00:13Data chart is a type of diagram or graph where data is represented by various symbols

00:22such as bars in bar graph, lines in line graph, or slices in pie chart.

00:31Today we will learn what are bar graphs.

00:36A bar chart is a chart with rectangular bars where the length of bars represent the value of something.

00:47And there is a scale along the length of bars which is used to measure the length of bars.

00:54The bars can be plotted horizontally or vertically.

00:59Bar graphs are used to compare the values of given items at any given point of time.

01:07Let's learn more about bar graphs using some examples.

01:13Here we have some data.

01:16A farmer sold different quantities of fruits in a particular month and he recorded the sales like this.

01:25Now we will store this data in the form of a bar graph.

01:31First of all, determine what will be the title of our bar graph.

01:37Like it can be, Quantities of Fruits Sold.

01:43A bar graph has two axes, x-axis and y-axis.

01:50We have two types of data.

01:54One is the numeric data showing quantities of fruits in kgs.

02:00And the other is textual data, the name of fruits.

02:05The axis which shows numeric data is called scale.

02:11As on the y-axis, we are showing the numeric data.

02:16And our numeric data is in the range of 1 to 40.

02:22So, make a scale showing numbers 1 to 40.

02:28Now, on x-axis, we will show the names of fruits and will also relate them to their quantities.

02:37Like it's given that 35 kgs of apples were sold.

02:42So, make a rectangular bar up to the mark of 35.

02:47And label it with apples.

02:50Now, next fruit is orange.

02:53Quantity of oranges sold is 30 kgs.

02:57So, make a rectangular bar up to the mark of 30.

03:01And label it with oranges.

03:05Now, next fruit is banana.

03:08Quantity of bananas sold is 10 kgs.

03:12So, make a rectangular bar up to the mark of 10.

03:17And label it with banana.

03:20Now, the next fruit is kiwi.

03:23The quantity sold is 25 kgs.

03:27So, make a rectangular bar up to the mark of 25.

03:32And label it with kiwi.

03:35Now, next fruit is blueberry.

03:38It's quantity sold is 40 kgs.

03:42So, make a rectangular bar up to the mark of 40.

03:47And label it with blueberry.

03:50Now, next fruit is grapes.

03:53And the quantity sold is 5 kgs.

03:56So, make a rectangular bar up to the mark of 5.

04:00And label it with grapes.

04:03And our bar graph is ready.

04:06This is the graph we just made.

04:09Now, let's read it.

04:12Here the bars are drawn vertically on horizontal axes.

04:18This axis is known as horizontal axis or x-axis.

04:25The length rectangular bars are represent the quantities of corresponding fruits sold in kgs.

04:34Length of the bars is measured with the vertical scale along the vertical axis or y-axis.

04:43As the numerical data is give on the vertical axes.

04:49This axis is the vertical axis which shows 35 kgs of apples sold.

04:57Quantity of oranges sold is 30 kgs.

05:01Quantity of bananas sold is 10 kgs.

05:06Blueberries are sold the most.

05:09Bananas are sold the least.

05:12So, kids, data in the form of charts is much easier to read.

05:18And represent.

05:20It is easier to compare data values.

05:24Now, let's see another example.

05:28We are given with another data from a class of students.

05:33Favorite game of each student was asked and noted down like this.

05:39Five students like hockey the most.

05:43That is a favorite game of five students is hockey.

05:49Favorite game of one student is tennis.

05:54Favorite game of nine students football and so on.

06:01Now, let's see how it can be represented in the form of a bar graph.

06:07We have two types of information.

06:11One is the numeric values given, the number of students.

06:17One is textual values given the names of their favorite game.

06:22First of all, we can give a title to our chart.

06:27It can be choice of games in a class.

06:32We can give titles to each axis of graph.

06:36Let x-axis be number of students.

06:40Let y-axis be name of the favorite game.

06:45X-axis represents the number of students.

06:48So, it will be the scale.

06:51Number of students is in the range of one to nine.

06:57So, let the scale be numbered one to ten.

07:02Now, on y-axis will show the names of games.

07:08And we will also relate them to the number of students whose favorite game it is.

07:15Like, it's given that five students like swimming the most.

07:21So, make a rectangular bar on y-axis up to the mark of five.

07:29And label it with swimming.

07:34Now, it's given that two students like archery the most.

07:39So, make a rectangular bar on y-axis up to the mark of two.

07:45And label it with archery.

07:48Now, it's given that three students like shooting the most.

07:53So, make a rectangular bar on y-axis up to the mark of three.

08:00And label it with shooting.

08:03Now, it's given that eight students like cricket the most.

08:07So, make a rectangular bar on y-axis up to the mark of eight.

08:13And label it with cricket.

08:17Similarly, we can draw bars for all.

08:21And our graph will be ready.

08:25This is a graph where the rectangular bar are drawn horizontally on the y-axis.

08:33And the scale is drawn on the x-axis.

08:37Let's read the graph.

08:40Graph shows that the favorite game of students is football.

08:46As the bar corresponding to football is the longest.

08:50And the length of bar is nine.

08:53That is, nine students like football.

08:57Least favorite game of students in the class is tennis.

09:02And only one student likes tennis the most.

09:07Second most favorite game in the class is cricket.

09:11As eight students like cricket the most.

09:14So, kids, data represented in the form of a bar graph is easy to read.

09:22So, kids, today we learned what are data charts.

09:27And learned how to make a bar graph out of the given data.

09:32Also, how to read a bar graph.

09:36Now, you may go ahead and take a quiz to learn more.

09:40Bye-bye.

Graphs - Bar Graphs

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