Introduction
An introduction and overview of trends.

Linear
Each time series is modeled using a straight line.

Parabolic
Each time series is modeled using a parabola, also called a quadratic curve.

Exponential
Each time series is modeled using an exponential curve, also called a geometric curve.

S-shaped (Gompertz)
Each time series is modeled using a Gompertz curve. These curves take the shape of an S and come with lower and upper bounds on the curve.

Logistic
A logistic curve is a common S-shaped curve.