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    The production of goods in a factory over 9 months is shown in the graph. The average growth (in tons per month) over the period under consideration
    Question

    The production of goods in a factory over 9 months is shown in the graph.

    The average growth (in tons per month) over the period under consideration

    A.

    is 0.3

    B.

    is 0.4

    C.

    varies between -0.2 and +0.5

    D.

    varies between +0.2 and +0.5

    Correct option is A

    Solution:

    The production values (in tons) from month 0 to 8 are visually:

    Average Growth=(3.02.6)+(3.33.0)+(3.53.3)+(3.83.5)+(4.23.8)+(4.04.2)+(4.54.0)+(5.04.5)8=2.48=0.3\text{Average Growth} = \frac{(3.0 - 2.6) + (3.3 - 3.0) + (3.5 - 3.3) + (3.8 - 3.5) + (4.2 - 3.8) + (4.0 - 4.2) + (4.5 - 4.0) + (5.0 - 4.5)}{8} \\= \frac{2.4}{8} = 0.3

    Final Answer:
    (a) is 0.3​​

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