Graphs - Bar Graphs
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LearningTranscript
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.