| L8a: | Simple linear (i.e., y=b0+b1 x) (search also class L8h) | (4 routines) |
| L8b: | Polynomial (e.g., y=b0+b1 x+b2 x2) (search also class L8c) | (1 routine) |
| L8c: | Multiple linear (i.e., y=b0+b1 x1+…+bp xp) | (23 routines) |
| L8d: | Polynomial in several variables | (0 routines) |
| L8e: | Nonlinear (i.e., y = F(X,b)) (search also class L8h) | (10 routines) |
| L8f: | Simultaneous (i.e., Y = Xb) | (0 routines) |
| L8g: | Spline (i.e., piecewise polynomial) | (4 routines) |
| L8h: | EDA (e.g., smoothing) | (1 routine) |
| L8i: | Service routines (e.g., matrix manipulation for variable selection) | (2 routines) |