Texas Instruments TI-83 PLUS - Manual (Page 26)

TI-83 Plus Operating the TI-83 Plus Silver Edition 23
Func, Par, Pol, Seq
Graphing modes define the graphing parameters. Chapters 3, 4, 5, and 6
describe these modes in detail.
Func (function) graphing mode plots functions, where Y is a function of X
(Chapter 3).
Par (parametric) graphing mode plots relations, where X and Y are
functions of T (Chapter 4).
Pol (polar) graphing mode plots functions, where r is a function of q
(Chapter 5).
Seq (sequence) graphing mode plots sequences (Chapter 6).
Connected, Dot
Connected plotting mode draws a line connecting each point calculated
for the selected functions.
Dot plotting mode plots only the calculated points of the selected
functions.