Every wednesday afternoon, the homeowner mows the lawn to the same height.

Here the weeks or intervals of the graph are from wednesday to wednesday.

Let the homeowner mows the lawn to the height .

Throughout the week, the height of the grass increases which is shown as linear

pattern.

Again on wednesday, the grass is cut down to the height .

This process continues for every week.

Graph :

Graph of the grass height as the function of time for four weeks:

Weeks are measured from Wednesday to Wednesday.

Graph of the grass maintained by a homeowner: