1)
\The standard form of ellipse equation is
\
Find the ellipse equation.
\Observe the graph,
\The center and radius of the circle 

The horizontal ellipse equation is
\
2)
\Find length of the minor axis.
\Observe the graph,
\The center and radius of the circle 
Length of the minor axis is 
3)
\Find the ellipse equation.
\Observe the graph,
\The center and radius of the circle 

The horizontal ellipse equation is
\
4)
\The standard form of ellipse equation is
\
Find the foci.
\Observe the graph,
\The center and radius of the circle 
Center is
\
Foci general form is 
The foci is 