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    5. What is the correlation coefficient of the straight line ax+by+c=0 wherein a>0 and b>0

    Question

    What is the correlation coefficient of the straight line

    ax+by+c=0 wherein a>0 and b>0
    A 1 Correct Answer Incorrect Answer
    B -1 Correct Answer Incorrect Answer
    D -a/b Correct Answer Incorrect Answer

    Solution

    If the straight line has a positive slope then correlation coefficient is 1, if the slope is negative then it's -1. Here the line has a negative slope (-a/b , a,b are positive). So r=-1

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