If your graph looks different (axes are not visible, there is a grid of dots, etc.), you may have some format settings that have been changed. To correct this, you can reset your defaults. Click here for instructions on how to reset your defaults.
Otherwise, you probably have a function or sequence entered in your calculator whose graph is being displayed. To prevent this, follow these steps:
(Y-VARS submenu)
You should now be able to obtain a standard graph that matches the one shown.