and its inverse.

1. At the main menu, use the arrow keys to move to the menu item Conic Sections and press . If you have a mouse you can just click on the menu item Conic Sections.
2. You will now see an elaborate menu which provides various ways of entering data for a conic section:

   

3. Press to get to Plotting Style. Using the arrow keys move the small triangle so that it points to the option Focal Points & Asymptotes and press . If you are using a mouse, all you need to do in this step is to point and click at the menu item Focal Points & Asymptotes.
4. Press to get to General Equation Constants or point and click your mouse at this item.
5. Enter the coefficients:

   A = 1

   B = 0

   C = -3

   D = -4

   E = 5

   F = 8

6. Press to get to the menu items at the bottom of the screen and use the arrow keys to move to Plot and press . If you have a mouse then just point to Plot on the bottom of the screen and click the mouse button.