Graph Type

Function Derived^a

R²

Linear

Y = 8.4478x + 15.08

0.84

Linear (Forced Zero Intercept)

Y = 10.876x

0.92

Exponential^b

Y = 3.0094e^0.4923x

0.46

Quadratic

Y = −0.9224x² + 16.427x + 7.3094

0.91

Quadratic (Forced Zero Intercept)

Y = −1.2073x² + 19.681x

0.91

Trinomial

Y = 0.2627x³ – 4.5518x² + 28.604x + 2.0136

0.95

Trinomial (Forced Zero Intercept)

Y = 0.2833x³ – 4.8987x² + 30.27x

0.95