Question

did i do this right?

Answer 1

This ellipse has a vertical major axis. Thus the formula is
\(\Large\frac{x^2}{b^2}+\frac{y^2}{a^2}=1\)
Where b = radius of vertical major axis and a = radius of horizontal minor axis

(you're wrong)

Answer 2

using the equation studygurl provided, just swap a and b