Element | Regression equation | P | R2 |
Cd | y = −0.06ln(x) − 0.001 | 0.008 | 48% |
Pb | y = −0.016ln(x) + 0.46 | 0.92 | 0% |
V | y = 0.030ln(x) − 0.0017 | <0.001 | 84% |