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Draw a Frequency Polygon from the Information Given in the Following Table. - Algebra

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Graph

Draw a frequency polygon from the information given in the following table.

Age of blood donar (Years) No. of blood donars
Less than 20 0
Less than 25 30
75Less than 30 75
165Less than 35 127
Less than 40 165
Less than 45 185
Less than 50 197
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Solution

 

Class (Age of blood donor) Class mark Frequency
(No. of donors)
co-ordinates
15-20 17.5 0 (17.5, 0)
20-25 22.5 30 (22.5, 30)
25-30 27.5 45 (27.5, 45)
30-35 32.5 52 (32.5, 52)
35-40 37.5 35 (37.5, 35)
40-45 42.5 20 (42.5, 20)
45-50 47.5 12 (47.5, 12)
50-55 52.5 0 (52.5, 0)

Draw the
axes. Plot points choosing a proper scale. Draw the frequency polygon.

Concept: Frequency Polygon
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