Statistics › Section L · Linear regression and correlation › Topic L.1
Linear equations, slope, and intercept
Before data meet a line, the line itself must be understood. This topic reviews the algebra every later regression topic stands on - slope as a rate, intercept as a starting point, and the straight line that ties them together.
In this topic
- The straight line, reviewed
- Slope-intercept form
- Slope: the rate of change
- Intercept: the starting value
- Worked example: the taxi fare
- Worked example: a line from two points
- Slope in context: reading units
- Steepness and comparison
- Common mistakes to avoid
- Key takeaways
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