| Example | Gas emission | n | k | Multiple regression model |
| 1 | NO | 22,200 | 15 | linear |
| 2 | NO | 22,200 | 30 | polynomial |
| 3 | NO | 5485 | 15 | linear |
| 4 | NO | 5485 | 30 | polynomial |
| 5 | NO | 96 | 15 | linear |
| 6 | NO | 96 | 30 | polynomial |
| 7 | NO | 8444 | 15 | linear |
| 8 | NO2 | 8444 | 15 | linear |