Question

The following data shows India's total population (in millions) from 1961 to 201l.

Year	1961	1971	1981	1991	2001	2011
Population (in millions)	360	420	540	680	1020	1200

Represent the above data by a bar graph

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 names of the soap brands at points taken at uniform gaps.
Step 3: Choose the scale: 1 small division = 10 millions people
Step 4: Then the height of the various bars are:
Population in 1961 = $\left(\frac{1}{10}\times 360\right)=36$ small divisions
Population in 1971 = $\left(\frac{1}{10}\times 420\right)=42$ small divisions
Population in 1981 = $\left(\frac{1}{10}\times 540\right)=54$ small divisions
Population in 1991 = $\left(\frac{1}{10}\times 680\right)=68$ small divisions
Population in 2001= $\left(\frac{1}{10}\times 1020\right)=102$ small divisions
Population in 2011 = $\left(\frac{1}{10}\times 1200\right)=120$ small divisions
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: