Ecological Modeling

Ecological Modeling (FOR 8515)

David Larsen  
Spring Semester, Even Years



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Linear Equations

y = b0 + b1 x

Intercept b0 = 0.2
Slope b1 = 1
Linear positive equation
y = b0 - b1 x

Intercept b0 = 1.2
Slope b1 = 1
Linear negative equation

Quadratic Equations

y = b0 + b1 x - b2 x2

Intercept b0 = 0.2
b1 = 3.5
b2 = 3.6
Quadratic positive-negative equation
y = b0 - b1 x + b2 x2

Intercept b0 = 1.2
b1 = 3.5
b2 = 3.6
Linear negative-positive equation

Cubic Equations

y = b0 + b1 x - b2 x2 + b3 x3

Intercept b0 = 0.2
b1 = 3.5
b2 = 3.6
b3 = 3.6
Cubic positive-negative-positive equation
y = b0 - b1 x + b2 x2 - b3 x3

Intercept b0 = 1.2
b1 = 3.5
b2 = 6.6
b3 = 3.6
Cubic negative-positive-negative equation
y = b0 - b1 x + b2 x2 + b3 x3

Intercept b0 = 0.2
b1 = 3.5
b2 = 6.6
b3 = 3.6
Cubic negative-positive-positive equation
y = b0 + b1 x - b2 x2 - b3 x3

Intercept b0 = 1.2
b1 = 3.5
b2 = 6.6
b3 = 3.6
Cubic positive-negative-negative equation

Created by David R. Larsen December 15, 2009
Last Updated: December 15, 2009