Determine a least square geometric curve, Mechanical Engineering

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Determine a least square geometric curve y = axb to the following data :

x:  1   2  3   4   5

y: 0.5  2 4.5 8 12.5

Fit a straight line y = a + bx to the following data by the process of moments :

x: 1  2   3    4

y: 16 19 23 26


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