##### FC-17 - Proximity and distance decay

- Describe real world applications where distance decay is an appropriate representation of the strength of spatial relationships (e.g., shopping behavior, property values)
- Explain the rationale for using different forms of distance decay functions
- Explain how a semi-variogram describes the distance decay in dependence between data values
- Outline the geometry implicit in classical “gravity” models of distance decay
- Plot typical forms for distance decay functions
- Write typical forms for distance decay functions
- Write a program to create a matrix of pair-wise distances among a set of points
- Describe real world applications where distance decay would not be an appropriate representation of the strength of spatial relationships (e.g., distance education, commuting, telecommunications)

## FC-18 - Adjacency and connectivity