Question 820011
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{x^2/25 + y^2/16 = 1}}}
{{{x^2/5^2 + y^2/4^2= 1}}}  C(0,0)
major axis:  horizontal, length 10, minor axis vertical, length = 8
{{{drawing(300,300,   -10,10,-10,10,  green(arc(0,0,10,8)),
 grid(1),
graph( 300, 300, -10,10,-10,10,0))}}}
 Standard Form of an Equation of an Ellipse is {{{(x-h)^2/a^2 + (y-k)^2/b^2 = 1 }}} 
where Pt(h,k) is the center. (a variable positioned to correspond with major axis)