Question 616682
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
 {{{y^2/16 - x^2/9 = 1}}} or{{{y^2/4^2 - x^2/3^2 = 1}}} 
center, (0,0)
asymptotes, y = ± 4/3x
vertices, (0,-4), (0,4)
and foc(0,-5),(0,5)   ||Note: {{{sqrt(16 + 9) = sqrt(25)}}}= 5
{{{drawing(300,300,   -10, 10, -10, 10,    grid(1),
circle(0, 4,0.3),
circle(0, -4,0.3),
circle(0, 5,0.3),
circle(0, -5,0.3),
graph( 300, 300, -10, 10, -10, 10,  0,(4/3)x,(-4/3)x,4sqrt(1 + x^2/9), -4sqrt(1 + x^2/9) ))}}}