The graph shows relationship between amount of water required (thousand litres) to produce grains (kg).Water required(in thousand litres) to produce 1 kg of grain is?
A
5
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B
7
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C
9
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D
11
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Solution
The correct option is C 9 Here,
Unit rate = slope (m) = y2−y1x2−x1
=45−275−3
Hence, 9 thousand litres of water is required to produce 1 kg of grain.