diff --git a/module3/exo3/exercice_fr.Rmd b/module3/exo3/exercice_fr.Rmd
index 832bbb2149df12167e44ad365b294f16657bed83..c72cdc1f07d920822d0a61c2d54396806dddebbe 100644
--- a/module3/exo3/exercice_fr.Rmd
+++ b/module3/exo3/exercice_fr.Rmd
@@ -109,7 +109,7 @@ reg_lin_log<-lm(MA~log(Yr),data=MA)
 summary(reg_lin_log)
 plot(reg_lin_log)
 
-reg_lin<-lm(MA~Yr+I(Yr^2)+I(Yr^3),data=MA)
+reg_lin<-lm(MA~Yr+I(Yr^2),data=MA)
 summary(reg_lin)
 plot(reg_lin)
 tail(predict(reg_lin))