The equation of the circle is
. Where
and
.
Algebric Example :
\The value of
does not affect the domain. It only shifts the graph up and down.
The value of
does affect the domain as it shifts the graph left and right.
The value of
determines the domain.
The domain
is
.
Graphical Example :
\Let us consider a function
.
Therefore the domain is
.

Graph The function
.
Graph :
\
Observe the graph in which the circle has
.
\
.
Graph :
\Function is
.
Domain of the circle is
.