Update MODEL9.TXT

Same comment as previoulsly

src/fr/ird/climprod/resources/models/MODEL9.TXT

@@ -6,9 +6,14 @@ linear relationship between the CPUE and the environmental variable V.
 This latter variable is supposed to only influence the abundance of the
 stock (surplus production) and not the catchability coefficient.
 
-After fitting this model, if the value of the parameter a is not 
-significantly different from zero, it is suggested to try the following 
-model which has no constant term and more degrees of freedom:
-CPUE = a V + b E
+After fitting this model, if the value of the parameter  a  is not significantly 
+different from zero, it is suggested to try fitting and validating the following 
+model which has no intercept parameter (constant term a) but, as a result, has 
+more degrees of freedom: 
+
+  CPUE = a V + b E.
+
+For doing this, please use click on "Modelization" and then on 
+"Fit a model directly" in the main menu of CLIMPROD.
  
 
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