Question
Prepare a bar graph of the data given in question $28.$
✓
Answer
In order to construct a bar graph, first we have to make a table representing the pictograph in tabular form of question $28.$
In order to construct a bar graph representing the above data, we follow the following steps:
Step I: Take a graph paper and draw two mutually perpendicular lines $OX$ and $OY.$ Let $OX$ as the horizontal axis and $OY$ as the vertical axis.
Step II: Along $OX,$ mark surname and along $OY,$ mark number of people.
Step III: Along $OX,$ choose the uniform (equal) width of the bars and the uniform gap between them, according to the space available for the graph.
Step IV: Choose a suitable scale to determine the heights of the bars, according to the availability of space. Here, we choose $1$ unit length represents $100$ people.
Step V: Calculate the height of various bars as follows:
Hence, the required bar graph for the given data is shown below: 
| Surname | Number of people |
| Khan | $350$ |
| Patel | $500$ |
| Rao | $400$ |
| Roy | $400$ |
| Saikia | $200$ |
| Singh | $300$ |
Step I: Take a graph paper and draw two mutually perpendicular lines $OX$ and $OY.$ Let $OX$ as the horizontal axis and $OY$ as the vertical axis.
Step II: Along $OX,$ mark surname and along $OY,$ mark number of people.
Step III: Along $OX,$ choose the uniform (equal) width of the bars and the uniform gap between them, according to the space available for the graph.
Step IV: Choose a suitable scale to determine the heights of the bars, according to the availability of space. Here, we choose $1$ unit length represents $100$ people.
Step V: Calculate the height of various bars as follows:
| Surname | Height of bars |
| Khan | $\frac{350}{100}=3.5\text{ units}$ |
| Patel | $\frac{500}{100}=5\text{ units}$ |
| Rao | $\frac{400}{100}=4\text{ units}$ |
| Roy | $\frac{400}{100}=4\text{ units}$ |
| Saikia | $\frac{200}{100}=2\text{ units}$ |
| Singh | $\frac{300}{100}=3\text{ units}$ |
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