[Richard Little's Home Page] [Math
Dept Home Page] [Math Archives]

A Basic Guide to the TI-85

Knoxville, Tennessee

This is a web version (1.0) of a guide that I originally
wrote in the summer of 1994, based on class handouts that I gave during
the previous academic year. It was modified in the summer of 1995 and now
is in it's final written form. For more info, see the introduction.
If you have any comments you can e-mail me at rlittle@math.utk.edu.

All material here is © 1996 Richard E. Little. Feel free to print out
a portion or all of this guide, just be sure to keep the copyright notice
in place. If you are in the Knoxville area, you can get a hardcopy version
of the original at Graphic Creations, located on the UTK campus at 1809
Lake Avenue (522-6221).

- Conventions: How calculator keys and menu items are described; keys not mentioned

1. Entering Expressions

- Basic Math : using ;
vs. ; handling
`SYNTAX ERROR`

.

- Using Functions: order of entry; exercises showing the importance of parentheses.
- Correcting Mistakes: using , , , and ; note and caution about .

- Entering Names: using and ; exercise involving both.
- Assigning Variables: using ; using variables in computations; practice exercise.
- The Answer Variable: using ; note on when it is automatically inserted.

- Accessing Functions: via menus, spelling out, and with ; exercise with .
- Navigating Menus: using , , and .

- Default windows and Range Settings: viewing window descriptions; how to alter the windows; explanation of [-10, -10, 1] by [-10, -10, 1].

- Sample Equations and Functions: Examples to graph and what their default graphs look like.
- Initial Setup: using .
- Graphing : using , , and .
- Saving Equations: clearing equations, including warning; deselecting with ; vs. .
- Graphing the remaining equations and functions:(solving forbefore graphing), (actually graphing), and .

- Sources of Error: human error; calculator error.
- Incomplete Graph: example using odd root.
- Too Much Graph: example using rational function.

- Algebraic Solution: Example to solve together with exact answer to check our calculator work against.
- Graphing Two Equations Simultaneously: using ; entering two equations.
- Finding the Coordinates of the Two Intersections: using , , , , and .
- Finding the Third Solution: why solution
must exist; using , changing
`xScl`

and`yScl`

.

[Richard Little's Home Page] [Math Dept Home Page] [Math Archives]