Question

The air distances of four cities from Delhi (in km) are given below:

City	Mumbai	Kolkata	Hyderabad	Chennai
Distance from Delhi(in km)	1100	1340	1220	1700

Draw a bar graph to represent the above data.

Answer 1

The following steps are followed while drawing the bar graph:

Step 1: On a graph paper, draw a horizontal line OX and a vertical line OY, representing the x-axis and y-axis, respectively.
Step 2: Along OX, write the time interval in years at points taken at uniform gaps.
Step 3: Choose the scale: 1 small division = 10 km
Step 4: Then the height of the various bars are:
$$\begin{gathered} \mathrm{Distance}\mathrm{of}\mathrm{Mumbai}\mathrm{from}\mathrm{Delhi}=\left(\frac{1}{10}\times 1100\right)=110\mathrm{small}\mathrm{divisions} \\ \mathrm{Distance}\mathrm{of}\mathrm{Kolkata}\mathrm{from}\mathrm{Delhi}=\left(\frac{1}{10}\times 1340\right)=134\mathrm{small}\mathrm{divisions} \\ \mathrm{Distance}\mathrm{of}\mathrm{Hyderabad}\mathrm{from}\mathrm{Delhi}=\left(\frac{1}{10}\times 1220\right)=122\mathrm{small}\mathrm{divisions} \\ \mathrm{Distance}\mathrm{of}\mathrm{Chennai}\mathrm{from}\mathrm{Delhi}=\left(\frac{1}{10}\times 1700\right)=170\mathrm{small}\mathrm{divisions} \end{gathered}$$
Step 5: On the x-axis, draw bars of equal width and of heights obtained in step 4 at the points marked in step 2.

The completed bar graph is as shown below: