Answers:
Just in case, check to make sure that both equations are in
Does it graph one and then the other, but you can see both?
Then go to the MODE key and arrow down to where it says SEQUENTIAL and SIMUL, arrow over to SIMUL and hit ENTER.
Can you only see one?
Your window is probably not set in a way that you can see both equations. Try going to ZOOM and arrowing down to ZOOM FIT (ENTER), or figuring out what part of the coordinate plane you want to see and entering the limits manually. Press the WINDOW key and enter in the Ymin/max and Xmin/max.
Good Luck.
Make sure you have the grah big enough to see both of the equations. Erase both equations and retype them in one a a time. Don't get frustrated and keep trying!!
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