TI-83 Plus Works most of the time. One single verticle line stays in upper right hand grid and prevents answers to line up properly. Throws everything off by a line. Also one verticle line missing from graph. I assume it's the one I'm talking about. Can a line on the screen get misplaced and stay there? Batteries are new except backup battery. Any suggestions???
Answers & Comments
This could be an assymtote and if you really want exact answers use the table function or just press trace and type in an x value