Fit y = intercept + slope*x to 2–64 declared pairs using positive weights and exact rational normal equations. Returns residuals and weighted SSE rounded to 12 decimal places, plus finite float64 RMSE. Rejects degenerate X values; weights are not verified uncertainties. Not field certification.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.03 USDC | 0xec84...de28 |
| Arbitrum One | exact | $0.03 USDC | 0xec84...de28 |