Data Science
Your First Model: Linear Regression
Senior Data Analyst
May 7, 2026
6 min read
The Code
from sklearn.linear_model import LinearRegression
model = LinearRegression()
model.fit(X_train, y_train)
predictions = model.predict(X_test)
Evaluate with R-Squared
from sklearn.metrics import r2_score
print(f"R² Score: {r2_score(y_test, predictions):.2f}")
*Day 128: Logistic Regression for Classification.*