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Regression analysis is being used to find the line of best fit (y = a + bx) from five pairs of data. The calculations have
produced the following information:
Σx = 129       Σy = 890     Σxy = 23,091        Σx2 = 3,433        Σy2 = 29,929
What is the value of ‘a’ in the equation for the line of best fit (to the nearest whole number)?
A   146
B   152
C   210
D   245

A

b

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A

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a

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q

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a

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a……算死了

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hey

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o

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谢谢

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