IF the regression Yi=b1+b2X2i+b3X3i+b4X4i+ei represent model 1, and regression Yi=b1+b3X3i+ ei represent model 2. then using restricted least square. the number of restriction =????

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Equations and Inequations

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.