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Graphical Representation of Statistical Data — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsGraphical Representation of Statistical Data5 Marks
Question
The population of Delhi State in different census years is as given below:
Census year
$1961$
$1971$
$1981$
$1991$
$2001$
Population in Lakhs
$30$
$55$
$70$
$110$
$150$
Represent the above information with the help of a bar graph.
✓

Answer

While drawing a bar graph, we keep in mind that: The width of the bars should be uniform throughout. The gap between any two bars should be uniform throughout. Bars may be either horizontal or vertical. To represent the given data by a vertical bar graph, we first draw horizontal and vertical axes. Let us consider that the horizontal and vertical axes represent the years and the population in lakhs respectively. We have to draw 5 bars of different heights given in the table. At first, we mark $5$ points in the horizontal axis at equal distances and erect rectangles of the same width at these points. The heights of the rectangles are proportional to the population in lakhs. The vertical bar graph of the given data is following:
Note that each bar is of the same width and the gap between them is uniform. Make sure that the width of the bars and the gap between them should not be necessarily same.

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