Geometric growth is also frequently

incorrectly dubbed exponential growth. Most of the time, when your first urge is to say "exponential growth", you really mean geometric.

Mathemetically, exponential growth is growth of the form

y^{x}
where x is not a

constant. Most of the

phenomena we observe and comment on are of the form

x^{n}

where n is a constant. When in doubt, say geometric.