What is polynomial regression?
Updated May 16, 2026
Short answer
Polynomial regression models non-linear relationships using polynomial features.
Deep explanation
It extends linear regression by adding powers of features, enabling curved relationships while still using linear coefficients.
Real-world example
Modeling growth curves in business revenue.
Common mistakes
- Using overly high degree causing overfitting.
Follow-up questions
- Is polynomial regression still linear?
- How do you choose degree?