Value of exports and imports of India are given in the following table. Draw arithmetic line graph for time series data given in the table.

Value of Exports and Imports of India in 100 crore

Year	Export	Import
1977 – 78	54	60
1978 – 79	57	68
1979 – 80	64	91
1980 – 81	67	125
1981 – 82	88	143
1982 – 83	98	158
1983 – 84	117	171
1984–85	119	197
1985 – 86	125	201
1986 – 87	157	222
1987 – 88	202	282
1988 – 89	211	353
1989 – 90	326	432
1990 – 91	440	479
1991 – 92	532	634
1992 – 93	698	731
1993 – 94	827	900
1994 – 95	1064	1227

Year	Export	Import
1995 – 96	1186	1369
1996 – 97	1301	1542
1997 – 98	1416	1761

Width of bars in a bar diagram need not be equal.

Width of rectangles in a histogram should essentially be equal.

 Histogram can only be formed with continuous classification of data.

Histogram and column diagram are the same method of presentaton of data.

Mode of a frequency distribution can be known graphically with the help of histogram.

Median of a frequency distribution cannot be known from the ogives.

What kind of diagrams are more effective in representing the following:

(i) Monthly rainfall in a year.

(ii) Composition of the population of Delhi by religion.

(iii) Components of cost in a factory.

Suppose you want to emphasise the increase in the share of urban non-workers and lower level of urbanisation in India as shown in Example 4.2. How would you do it in the tabular form?

How does the procedure of drawing a histogram differ when class intervals are unequal in comparison to equal class intervals in a frequency table?

The Indian Sugar Mills Association reported that, ‘Sugar production during the first fortnight of December 2001 was about 3,87,000 tonnes, as against 3,78,000 tonnes during the same fortnight last year (2000). The off-take of sugar from factories during the first fortnight of December 2001 was 2,83,000 tonnes for internal consumption and 41,000 tonnes for exports as against 1,54,000 tonnes for internal consumption and nil for exports during the same fortnight last season.’

(i) Present the data in tabular form.

(ii) Suppose you were to present these data in diagrammatic form which of the diagrams would you use and why ?

(iii) Present these data diagram-matically.