Answer
The graph is shown below.
Work Step by Step
The given equation is in the standard form of an ellipse's equation.
Larger denominator is $a^2=25$, so a=5.
Smaller denominator is $b^2=16$, so b=4.
Because the denominator of the $x^2$ term is greater than the denominator of the $y^2$ term, the major axis is horizontal, and the vertices are:
$(-a,0)=(-5,0)$ and $(a,0)=(5,0)$.
The minor axis is vertical, and the vertices are
$(0,-b)=(0,-4)$ and $(0,b)=(0,4)$.
Use endpoints on the major and minor axes to draw the ellipse.