How to Make a Bar Graph
In the previous post we have discussed about how to do standard deviation and In today's session we are going to discuss about How to Make a Bar Graph. In mathematics, we will go through different graph such as histogram graph, double bar graph. Here we will talk about bar graph. Generally bar graph are used to distinguish the different information, situations by using bars in the graph. Sometimes it is also called as bar charts. Here we will talk about How to Make a Bar Graph. Some steps to be followed while ploting bar graph are mention below:
Step 1: To construct a bar graph first draw the axis in the graph. As we know that two axis are present in a graph that is named as x – axis and y - axis.
Step 2: Then after chooose an appropriate scale and construct equal intervals.
Step 3: Now with the help of information of given data items label the horizontal axis.
Step 4: According to data items plot the bars.
Step 5: At last named the title of a graph.
Now we have to apply these steps in example.
For example: Using the table mention below plot a bar chart.
(know more about Bar Graph, here)
Scores on the practice Test and the Test
Student Practice Test Test
John
60
70
Peter
75
90
Jeff
55
55
Mariya
80
95
Solution:
First of all select or named the title from above mention table. As we see in the table that the title of above table is 'Score on practice Test and Test'.
After that choose vertical bars.
Here scores are different from one another mostly by 5, 10, 15 or 20. It means select a scale of 10.
If we find any variation between scores then scores are like 1, 2, 3, 4, or 5, then it is better to select a scale of 1 or 2.
After marking names on x – axis and scores on y – axis. Suppose if we decide to plot horizontal bars then put names on y – axis and scores on x – axis.
At last plot the bars. Double bar graph is shown below:
This is how we plot double bar graph using above steps.
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