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Fit a straight line passing through points $(0,1), (1,2) , (2,3),(3,4.5),(4,6),(5,7.5)$
straight line • 521  views
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Here n=6

Equation of straight line is given as Y=a+bX ….(1)

Subject to

$∑y=an+b∑X \\ ∴24=6a-0 \\ ∴ a=4 \\ \text { And } ∑XY=a∑X+b∑X^2 \\ ∴46=0+70b\\ ∴b=0.6571$

from (1) the question of straight line is $Y=4+0.6571X$

Re substituting X & Y

$∴y=4+0.6571×x-3.2855 \\ y=1.3142x+0.7143$

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