Long description

A graph of the change in height of an oak tree, from 0 to 30 metres on the verticle axis, against age of the oak tree, for 0 to 900 years on the horizontal axis. The points follow a steep curve (with decreasing gradient) from close to 0 m at 0 years up to a height of about 19 m after 100 years. Subsequent points are at a height of about 24 m after 200 years and 24 m after 800 years.