Please help me! Graphing ellipses!

Question

anonymous · Answer

I have to use graphing technology and I have geogebra. But I cant figure out how to enter this in! 
Graph an ellipse with foci at (0, ±2$$\sqrt{10}$$) and x-intercept at (9, 0) using graphing technology.

asnaseer · Answer

have you got geogebra up and running at the moment?

asnaseer · Answer

if you have then I can talk you through the steps

anonymous · Answer

yeah Its up!

asnaseer · Answer

ok, at the bottom of the screen there is an "Input" box - can you see that?

anonymous · Answer

yes

asnaseer · Answer

good - enter the following three coordinates into that box, pressing Return after each one:

(0, 2*sqrt(10))
(0, -2*sqrt(10))
(9, 0)

each entry will create a Point in geogebra

anonymous · Answer

okay im doing that now

asnaseer · Answer

you may have to zoom out the view to see all the points that have been created

anonymous · Answer

got it! I see them all!

asnaseer · Answer

great! :)

now final step is to select the ellipse tool from the toolbar at the top of the window - it looks like an ellipse with 3 points in it

asnaseer · Answer

then click on each of the 3 points you just created and wait for geogebra to do its magic. :)

anonymous · Answer

ohh thankyou soo much! :)

asnaseer · Answer

yw :)