Two-point form (Equation through two distinct points (handles non-vertical)
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Equation through two distinct points (handles non-vertical, non-horizontal).
What each symbol means
| Symbol | What it stands for |
|---|---|
| (x1,y1),(x2,y2) | Two distinct points on the line |
When to use this
If y2=y1, line is horizontal y=y1; if x2=x1, vertical x=x1.