Lesson 1
What is regression?
Big question
How can one line summarize a relationship between two economic variables?
Lesson progress
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Big question
Concept
Activity
Quiz
Learning objectives
- Explain what is regression? in plain language.
- Use the main concept correctly.
- Connect the lesson idea to a formula, graph, Python result, or real example.
Simple explanation
How can one line summarize a relationship between two economic variables?
Key terms
Example
How can one line summarize a relationship between two economic variables?
Python walkthrough
Interactive activity
Education and wage
Each dot is one observation. The fitted line summarizes the relationship between Education and Wage.
Slope: 2.33
Intercept: -10.10
R-squared: 0.949
Graph reading activity
Read the wage and education scatter plot.
0/3 graph-reading checks correct
Try it yourself
Write one plain-English sentence explaining the main idea from this lesson.
Common mistakes
Check these before you move on.
A regression coefficient describes a pattern unless the assumptions or research design support a causal interpretation.
Quick quiz
What is the main idea of What is regression??
Key takeaway
Use this lesson idea in a cautious, evidence-based regression interpretation.