TI-84 Plus Weird Graphing Problem

[draxus]

Hello all,
I have been having a really strange problem lately on my TI-84. Whenever I graph anything, there is always another graph which appears as a stretched parabola that spans the first and fourth quadrant. It is annoying because I cannot view certain parts of the graph I want to. Anyone know how to fix this?

Thanks in advance

 

[maxbur]

Have you tried resetting your memory on the calculator?