Coefficient of determination, proper fit regression line based on a set of data is analyzed. The higher the value of this coefficient indicated that the independent variables have more power in explaining the behavior of the dependent variable. As shown in Table (4-4) is shown in the coefficient of determination, the results of the estimated regression model is equal R2 =84 The estimated value of the coefficient of determination, is the fact that about 84% of the behavior of the dependent variable is explained by the independent variables, which is an indication of a relatively high correlation between the independent variables and the dependent variable.