1. ## Graphing an ellipse

Hello

Now I know that a circle isnt a function but buy using
y=(r^2-x^2)^0.5 and y=-(r^2-x^2)^0.5 one can be drawn on a graphing program.

Is there a way to do a similar thing but with an oval or ellipse (I want the ellipse to be vertical not horizontal)
x2 y2
-- + --- = 1

a2 b2
is all I could find relating to the graph of an ellipse but I am looking for something that has y=............ so I can enter it into the graphing program

Thank you!

2. ## Re: Graphing an ellipse

Solving for y gives you $y=\pm b\sqrt{1-\frac{x^2}{a^2}}$.