Linear Regression Interactive Playground
Add data points on a scatter plot and watch the Ordinary Least Squares (OLS) best-fit line, slope (m), intercept (c), and R² update instantly.
Concept Breakdown: Supervised vs Unsupervised Model Training
Imagine you are hiking down a mountain in pitch-black fog. You feel the slope with your feet and step downward. Gradient Descent does this mathematically — taking steps downhill until reaching the valley floor of lowest error.
When an AI spots spam emails, it can make two mistakes: letting spam through (False Negative) or blocking a real email (False Positive). A Confusion Matrix tracks these tradeoffs.
Click "Step (1 Iteration)" below. Watch the ball take mathematical steps down the parabolic curve until it settles comfortably at the bottom minimum!
Quick Reference & Instructions
Simple steps, pro tips, and execution details
Provide Inputs
Type, paste, or select your values in the form fields below.
Instant Live Analysis
Calculations and formatting happen automatically with zero delay as you type.
Copy or Use Output
Copy results or apply the clean output directly to your projects.
How It Works
Calculates exact analytical regression slopes and intercepts using closed-form covariance equations.
Formula & Logic
Frequently Asked Questions
Common questions about calculations, assumptions, and edge cases.
Yes, Linear Regression Interactive Playground is 100% free with unlimited calculations and zero paywalls or subscriptions.
Related Tools
Explore all ml tools →Gradient Descent Optimization Game
Interactive optimization game on 2D cost surfaces. Control learning rate to guide parameters to the global minimum without overshooting.
Confusion Matrix & ML Metrics Calculator
Input True Positives, False Positives, True Negatives, and False Negatives to instantly compute Accuracy, Precision, Recall, and F1-Score.