diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index fa900c652..7033a1d3c 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -11,7 +11,7 @@ BannerView::BannerView(
 ) :
   Shared::XYBannerView(parentResponder, inputEventHandlerDelegate, textFieldDelegate),
   m_derivativeView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
-  m_tangentEquationView(Font(), I18n::Message::LinearRegressionFormula, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_tangentEquationView(Font(), I18n::Message::AffineRegressionFormula, 0.0f, 0.5f, TextColor(), BackgroundColor()),
   m_aView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
   m_bView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
   m_numberOfSubviews(Shared::XYBannerView::k_numberOfSubviews)
diff --git a/apps/regression/base.universal.i18n b/apps/regression/base.universal.i18n
index a1bf08724..f04c13b35 100644
--- a/apps/regression/base.universal.i18n
+++ b/apps/regression/base.universal.i18n
@@ -1,4 +1,4 @@
-AffineRegressionFormula  = " y=a·x "
+LinearRegressionFormula  = " y=a·x "
 QuadraticRegressionFormula  = " y=a·x^2+b·x+c "
 CubicRegressionFormula  = " y=a·x^3+b·x^2+c·x+d "
 QuarticRegressionFormula  = " y=a·x^4+b·x^3+c·x^2+d·x+e "
diff --git a/apps/regression/model/affine_model.cpp b/apps/regression/model/affine_model.cpp
index fc18ac3aa..0356b7991 100644
--- a/apps/regression/model/affine_model.cpp
+++ b/apps/regression/model/affine_model.cpp
@@ -1,4 +1,4 @@
-#include "linear_model.h"
+#include "affine_model.h"
 #include "../store.h"
 #include <poincare/layout_helper.h>
 #include <math.h>
diff --git a/apps/regression/model/affine_model.h b/apps/regression/model/affine_model.h
index b2c0a7cd0..868664c21 100644
--- a/apps/regression/model/affine_model.h
+++ b/apps/regression/model/affine_model.h
@@ -1,5 +1,5 @@
-#ifndef REGRESSION_LINEAR_MODEL_H
-#define REGRESSION_LINEAR_MODEL_H
+#ifndef REGRESSION_AFFINE_MODEL_H
+#define REGRESSION_AFFINE_MODEL_H
 
 #include "model.h"
 
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index 824500e09..0fc663f45 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -1,4 +1,4 @@
-#include "affine_model.h"
+#include "linear_model.h"
 #include "../store.h"
 #include <poincare/layout_helper.h>
 #include <math.h>
@@ -23,16 +23,14 @@ double LinearModel::evaluate(double * modelCoefficients, double x) const {
 
 double LinearModel::levelSet(double * modelCoefficients, double xMin, double step, double xMax, double y, Poincare::Context * context) {
   double a = modelCoefficients[0];
-  double b = modelCoefficients[1];
-  if (a == 0) {
+  if (a == 0.0) {
     return NAN;
   }
-  return y-b;
+  return y/a;
 }
 
 void LinearModel::fit(Store * store, int series, double * modelCoefficients, Poincare::Context * context) {
   modelCoefficients[0] = store->slope(series);
-  modelCoefficients[1] = store->yIntercept(series);
 }
 
 double LinearModel::partialDerivate(double * modelCoefficients, int derivateCoefficientIndex, double x) const {
@@ -40,10 +38,6 @@ double LinearModel::partialDerivate(double * modelCoefficients, int derivateCoef
     // Derivate: x
     return x;
   }
-  if (derivateCoefficientIndex == 1) {
-    // Derivate: 1;
-    return 1;
-  }
   assert(false);
   return 0.0;
 }
diff --git a/apps/regression/model/linear_model.h b/apps/regression/model/linear_model.h
index 4fb6fd886..d98dbd756 100644
--- a/apps/regression/model/linear_model.h
+++ b/apps/regression/model/linear_model.h
@@ -1,5 +1,5 @@
-#ifndef REGRESSION_AFFINE_MODEL_H
-#define REGRESSION_AFFINE_MODEL_H
+#ifndef REGRESSION_LINEAR_MODEL_H
+#define REGRESSION_LINEAR_MODEL_H
 
 #include "model.h"
 
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index 2aa997b88..344244ab2 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -119,7 +119,7 @@ InvSortCommandWithArg = "sort>(L)"
 K = "k"
 Lambda = "λ"
 LcmCommandWithArg = "lcm(p,q)"
-LinearRegressionFormula  = " y=a·x+b "
+AffineRegressionFormula = " y=a·x+b "
 LogCommandWithArg = "log(x,a)"
 MatrixCommand = "[[\x11]]"
 MatrixCommandWithArg = "[[1,2][3,4]]"