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The y-intercept b is where x = 0 — the b in y = mx + b. From two points the tool derives slope and intercept; vertical lines (no y = mx + b form) are flagged.
Where a line through two points crosses the y-axis.
b = y − mx
| Symbol | Meaning |
|---|---|
| b | y-coordinate where x = 0 |
Through (0,1) and (2,5): m = 2, b = 1 → crosses at (0, 1).
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It anchors the line vertically — the starting value in growth/cost models.
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Content updated: September 2026