State the two normal equations used in fitting a straight line.

1.	State the two normal equations used in fitting a straight line.
Answer» The normal equations used in fitting a straight line are ΣY = na + b ΣX and ΣXY = a ΣX + b ΣX² Where n = number of years given in the data, X = time Y = actual value a, b = constants

Answer»

The normal equations used in fitting a straight line are ΣY = na + b ΣX and ΣXY = a ΣX + b ΣX²

Where n = number of years given in the data,

X = time

Y = actual value

a, b = constants

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