Question 421914
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Hi
equation of the ellipse with vertices (0, -1) and (12, -1) and minor axis of length 6
 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 and a and b are the respective vertices distances from center.

  C(6,-1)
  {{{(y+1)^2/36 + (x-6)^2/9 = 1}}}

{{{drawing(300,300,  -15,15,-15,15,  arc(6,-1,12,6),
 grid(1),
circle(-2, -8,0.4),blue(line(0,-1,12,-1)), green(line(6,-4,6,2)),  

circle(6,-1,0.4),
graph( 300, 300, -15,15,-15,15,0))}}}