Question 151665
The ellipse has the form of 
x^2/a^2 + y^2/b^2 = 1
As the x-intercept is +-3, so a = 3
As the y-intercept is +-4, so b = 4
Therefore the equation is
x^2/3^2 + y^2/4^2 = 1
or written as
x^2/9 + y^2/16 = 1