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The normal equations for a straight line y = ax + b are:
  • a)
    Σy = aΣx + nb and Σxy = aΣx2 + bΣx
  • b)
    Σxy = aΣx + nb and Σy = aΣx2 + bΣx
  • c)
    Σy = aΣx + nb and Σxy = aΣx2 + bΣxy
  • d)
    Σy = aΣx + nb and Σx2y = aΣx2 + bΣx
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The normal equations for a straight line y = ax + b are:a)Σy = a...
The normal equations for a straight line y = ax + b are:

∑x(y - ax - b) = 0
∑(y - ax - b) = 0

These equations can be used to find the values of a and b that best fit the given data points.
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Community Answer
The normal equations for a straight line y = ax + b are:a)Σy = a...
Let the sum of residues be E.

Solving these two equations, we get the normal equations as
Σy = aΣx + nb and Σxy = aΣx2 + bΣx.
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The normal equations for a straight line y = ax + b are:a)Σy = aΣx + nb and Σxy = aΣx2 + bΣxb)Σxy = aΣx + nb and Σy = aΣx2 + bΣxc)Σy = aΣx + nb and Σxy = aΣx2 + bΣxyd)Σy = aΣx + nb and Σx2y = aΣx2 + bΣxCorrect answer is option 'A'. Can you explain this answer?
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