Question

The following data shows India's total population (in millions) from 1951 to 2001.
Represent the data by a bar graph.

Year of census	1951	1961	1971	1981	1991	2001
population (in millions)	360	432	540	684	852	1020

Answer 1

We can draw the bar graph by following the given steps:
Step 1.- On a graph paper, draw a horizontal line OX as x-axis and vertical line OY as y-axis.

Step 2.- Along OX, write the year at the points that are taken at a uniform gap.

Step 3.- Choose the scale:
1 big division = 100 million
1 small division = 10 million

Step 4.- Heights of the various bars:
1951 = 36 small divisions = 3 big divisions and 6 small divisions
1961 = 43.2 small divisions = 4 big divisions and 3.2 small divisions
1971 = 54 small divisions = 5 big divisions and 4 small divisions
1981 = 68.4 small divisions = 6 big divisions and 8.4 small divisions
1991 = 85.2 small divisions = 8 big divisions and 5.2 small divisions
2001 = 102 small divisions = 10 big divisions and 2 small divisions

Step 5.- Draw bars of equal width on the x-axis. The difference between the two bars should also be the same.

We get the following bar graph: