Linear Regression
Your first real predictive model — simple, interpretable, and the foundation for understanding all of ML.
Learn it
Learn how linear regression fits a line to predict a number, what coefficients mean, and how it minimizes error. This is your first end-to-end model.
By the end you’ll be able to
- Fit a regression model
- Interpret coefficients
Free resources
- StatQuest — The Essence of Linear Regression (video)(opens in a new tab)Start here
Intuitive fit-a-line explainer
Free~10 min - Beginner scikit-learn Linear Regression (Kaggle notebook)(opens in a new tab)
Runnable notebook, no setup needed
Free~30 min - Google — Linear Regression module(opens in a new tab)
Loss, gradient descent, Colab exercises
Free80 min - scikit-learn — Linear Models (docs)(opens in a new tab)
Coefficients and least squares reference
Free
Practice
Train a linear regression on a dataset to predict a numeric target and interpret one coefficient.
Build it — your output
A trained regression model that predicts something real (house prices, tips) with reported error on test data.
Prove it — check yourself
You’re ready to move on when you can honestly say yes to each:
- Can you train a regression model with scikit-learn?
- Can you interpret a coefficient?
- Can you report error on test data?
Do it with AI
Use a free AI tool as your tutor and pair-programmer. Copy a prompt below into Claude, ChatGPT, or Gemini (for building, try Cursor or Copilot).
The habit: Try it yourself first — a little struggle is where the learning actually happens. Then ask for a hint before the answer — never copy blindly.
- Understand itClaude / ChatGPT / Gemini
I'm a beginner learning "Linear Regression". Explain it in simple terms with a real-world analogy, then ask me ONE question to check my understanding — don't reveal the answer.
- PracticeClaude / ChatGPT / Gemini
Give me 3 short practice problems on "Linear Regression" (my goal: fit a regression model), from easy to hard. Don't include the solutions yet — I'll try them first, then ask you to check.
- Get unstuckClaude / ChatGPT / Gemini
I'm stuck on this exercise about "Linear Regression": [paste your attempt here]. Give me ONE small hint to move forward — do NOT give me the full solution.
- Build & reviewCursor / Copilot
Here is my work for a "Linear Regression" task: [paste your code or answer]. Review it: point out what's wrong and WHY, and suggest improvements — but let me make the fixes myself.
- Prove itClaude / ChatGPT / Gemini
Quiz me on "Linear Regression". Ask me 5 questions one at a time, wait for my answer each time, then tell me if I'm right and briefly why.