手绘最佳拟合线：线性回归与几何作图

GeoGebra 命令及参数

1. Zip((r, c), c, cheese, r, years) → points
2. SD(years) → SD_{years}
3. SD(cheese) → SD_{cheese}
4. Mean(cheese) → AVG_{cheese}
5. Mean(years) → AVG_{year}
6. Segment(A, (x(B), y(A))) → SdYearLine
7. Segment(B, (x(B), y(A))) → SdCheeseLine
8. Line(A, C) → BestFitLine
9. Line(A, B) → NotBestFit
10. Segment(C, (x(B), y(A))) → rSD_{cheese}