diff --git a/linear-regression-parkinsons.py b/linear-regression-parkinsons.py
index e8c6f1e..bcb6f7e 100644
--- a/linear-regression-parkinsons.py
+++ b/linear-regression-parkinsons.py
@@ -1,2 +1,26 @@
 import pandas as pd
+import matplotlib.pyplot as plt
+
+
+class LinearRegression:
+    def __init__(self, add_bias = True)
+    self.add_bias = add_bias
+    pass
+
+    def fit(self,x,y):
+        if x.dim == 1:
+            x = x[:,None]
+        N = x.shape[0]
+        if self.add_bias:
+            x = np.column_stack ([x,np.ones(N)])
+        self.w = np.linalg.lstsq(x,y)[0]
+        return self
+
+    def predict(self,x)
+        if self.add_bias:
+            x = np.column_stack ([x,np.ones(N)])
+        yh = x@self.w
+        return yh
+    
+