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How to Find the Equation of a Line
Formula
Given two points, find the slope m = (y2-y1)/(x2-x1), then the y-intercept b = y1 - m*x1.
The equation in slope-intercept form is y = mx + b.
Common use cases:
- Determining trend lines from data points
- Graphing linear functions
- Finding intersection points of lines
Frequently Asked Questions
Dr. David Park
Applied Mathematician, PhD Mathematics
David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.
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