If in the empirical parameters involved a linear way, the equation system (3.3) is linear. Because of the abolition of the system of linear equations is simpler than solving non-linear equation system very much, so if possible, we transform the selected experimental formula of the form so that the parameters determining participation in that system, a linear way. For example, if in the selected function y = a + hsin (wx + f) value of w, then need to write a function as:
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