Write an equation of an ellipse in standard form with the center at the origin and with the given characteristics.

vertex at (-3, 0) and co-vertex at (0, 2)

x^2/9 + y^2/4 = 1
x^2/4 + y^2/9 = 1
x^2/3 + y^2/2= 1
x^2/2 + y^2/3 = 1

choose the correct answer of those four above