Problem 3: The table below gives temperatures T (in°C) and length L (in mm) of heated rod. If L= A. + A1 T, find the values of A, and Aj using linear least squares. T 40 50 60 70 80 L 600.5 600.6 600.8 600.9 601.0

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Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.