Year 1999

Tree NA = −4.9828 + 0.10002 Time

R² = 0.995

Tree AA = −3.2562 + 0.08926 Time

R² = 0.956

Tree NI = −2.9562 + 0.07174 Time

R² = 0.993

Tree AI = −3.1043 + 0.06885 Time

R² = 0.995

Tree C = −4.1836 + 0.08275 Time

R² = 0.931

Example: What is the prediction for resin in 70 days from Year 1999, Tree NA if today’s resin yield = 15 ml. Slope × days = 0.10002 × 70 = 7. Prediction for 70 days from now is 15 ml + 7 = 22 ml.