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Maths-

General

Easy

Question

If the lines of regression are 3x+12y=19 and 3y+9x=46 then $r subscript x y end subscript$ will be

0.289
– 0.289
0.209
None of these

The correct answer is: – 0.289

$r subscript x y end subscript equals square root of open parentheses fraction numerator negative 3 over denominator 12 end fraction close parentheses open parentheses fraction numerator negative 3 over denominator 9 end fraction close parentheses end root equals negative 0.289$ .

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