Originally Posted by

**Chizum** Hello, I'm having some problems getting functions to graph.

I am using a ti-83 plus. I am in function mode, and every other mode seems right as well. I go to y= and enter a basic polynomial function under y1 (such as y1 = 4x + 3). When I go to zoom, trace, or graph I get the error message "ERR:UNDEFINED".

My window settings are:

Xmin = 10 <=== Change to -10

Xmax = 11

Xsc1 = 0 <=== Change to 1

Ymin = 10 <=== Change to -10

Ymax = 11

Ysc1 = 0 <=== Change to 1

Xres = 1

I've consulted the manual but can't seem to figure anything out that relates to this problem. This is the same calculator I used in a statistics course, so perhaps one of the off-sets I changed for that course is interfering, although based on what I can tell I don't think that is the case.

This is also an urgent situation, so any help is very appreciated.