The function is
.
Graph:
\Graph of
is :

Observe the graph:
\The minimum value of
is
.
The value of
indicates the lowest point of the
.
As the value of
increases ,the height of the rope at its lowest point also increases.
Graph:
\Graph of
is :

Observe the graph:
\The minimum value of
is
.
As the value of
increases, the rope at its lowest point also increases.