Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Linear Functions and Models: Basics: Slope and Intercept
A mathematics tutorial that allows you to interactively learn and manipulate the slope and intercepts of a line.
Hofstra University
Hofstra University: Transport Geography: Transportation as a Derived Demand
An example of derived demand as it relates to the transportation industry.
Hofstra University
Hofstra University: Transport Geography: Roman Road Appian Way
Hofstra University offers an excellent image and several paragraphs of information on the Appian Way, a road that set the standard for road construction throughout Roman territory.