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Question

The heights of two different plants, plant A and plant B were measured at the end of each week for 3 weeks and the results are shown in the graph.

During which week did Plant B grow least?

A

1st week

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B

2nd week

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C

3rd week

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D

(a) and (c) above.

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Solution

The correct option is A 1st week
From the graph, we observe that:

Height of the plant B after 1 week = 1 centimetres

Height of the plant B after 2 weeks = 7 centimetres

Height of the plant B after 3 weeks = 10 centimetres

$∴$ Growth in 1st week = 1 centimetres
Growth in 2nd week = 6 centimetres
Growth in 3rd week = 3 centimetres

Thus the plant A grows least during first week.

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