Derive the formulas for a linear curve fit yx ax b for a s

Derive the formulas for a linear curve fit y(x) = ax + b for a set of N data points of the form (xi, yi) where i =1…N. Start from the beginning: define the error between each data point and the function (straight line in this case), find the total error, differentiate this expression, and manipulate the equations to solve for a and b. Your final answer should be two expressions, one to calculate a, and one to calculate b. Both a and b should be only expressed in terms of xi, yi, and N

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