Graph an ellipse with the center at the origin ( Major Vertical Axis )

Learn how to graph an ellipse with the center at the origin.
In this example, the b is before the a.
(a) is the major radius and (b) is the minor radius
The vertices are ( 0 plus or minus 4)
The covertices on the minor axis plus or minus 2,0
Next, draw the ellipse and find c using A squared plus B squared to find C
I then find the vertices and foci