Trendline equation

R²

R10

y = −0.1859x + 15.3

0.9998

R15

y = −0.1867x + 13.339

0.9996

R20

y = −0.1524x + 11.592

0.9973

R25

y = −0.1366x + 11.69

0.9975

R30

y = −0.1067x + 11.78

0.9995

R50

y = −0.0991x + 10.536

0.9987

R70

y = −0.1592x + 14.953

0.9987

R90

y = −0.157x + 19.497

0.9996

R100

y = −0.1174x + 14.475

0.9993

R150

y = −0.207x + 17.341

0.9973