R15S1

y = −2.0233x + 5.8184

R² = 0.9990

2.0233

R15S2

y = −1.8633x + 5.42

R² = 0.9895

1.8633

R15S3

y = −2.1776x + 6.2596

R² = 0.9840

2.1776

R18

y = −2.1824x + 6.2372

R² = 0.9985

2.1824

R18S1

y = −1.7841x + 5.2176

R² = 0.9961

1.7841

R18S2

y = −2.1565x + 6.2021

R² = 0.9974

2.1565

R18S3

y = −1.9932x + 5.7956

R² = 0.9833

1.9932

BA

y = −3.3814x + 9.2189

R² = 0.9998

3.3814

SBS

y = −2.966x + 8.2658

R² = 0.9991

2.9660