Example 9 If ā =(3, 2,–1), 6 =(2,0,–3), č =(1,-2, 3) What is the value of 2a + 6 + 3c? And find its magnitude

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Q: equentist one

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Q: . Find R ^ 2 and interpret it in context . Round to the hundredth percent .

A: Given from table  Correlation=R=0.7088847