Graphing functions, Solving Equations, Operations on Fractions / Mixed Numbers, and Solving Linear Systems of Equations.

What you will learn

Perform operations on fractions and mixed numbers

Graph the functions that you would use in College Algebra

Zoom your viewing window

Solving linear systems of equations

Perform matrix operations

Solve equations

Build a t-chart and evaluate functions


This course is meant to give the learner a solid foundation in the TI-89 for success in either an Intermediate or College Algebra course.  The TI-8x series calculators have reduced the difficulty of College Algebra by perhaps 50% from the “Dark Ages” of taking College Algebra!  The usage of graphing calculators has not lowered the rigor but allows students to focus more on the applications and challenging parts of the course.  Students no longer have to do some of the mundane mathematical calculations.

This course covers fractions/mixed numbers, graphing, solving equations, solving systems of equations, zooming, t-charts, and evaluating functions.  In this course, the TI-89 calculator is covered.  Many students come into a college algebra class that requires a TI-83 or TI-84 and they are quite lost in the course.  The TI-89 is radically different than the TI-83 or TI-84.  The buttons and menus are not the same and cannot easily be found by most students.

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Technology has become an important component of mathematics.  Even if you are in a class that does not allow a TI-89 calculator, you can use it to double-check your work by hand.

This course covers just the important parts of the TI-89 calculator for usage in College Algebra.  There are many other functions that are not covered.  If you decide to take the course, good luck with it and the future algebra course that you are planning on taking!




Overview of the TI-89

Fractions on the TI-89

Changing from Decimal Form to Fraction Form
Simplifying or Reducing a Fraction
Adding Fractions
Subtracting Fractions
Multiplying Fractions
Dividing Fractions
Changing from Improper Fraction Form to Mixed Number Form
Changing from Mixed Number Format to Improper Fraction Format
Adding Mixed Numbers
Subtracting Mixed Numbers
Multiplying Mixed Numbers
Dividing Mixed Numbers
Mixed Numbers

Graphing using the TI-89

Graphing Y = X
Graphing Y = X^2
Graphing Y = X^3
Graphing Y = X^(1/2)
Graphing Y = SQRT(X)
Graphing Y = CUBERT(X)
Graphing Y = 4THROOT(X) (the 4th root of x)
Graphing Y = ABS(X)
How to Graph a Rational Function
How to Handles Negatives and Minuses in a Graphing Problem
Graphing Example 1
Graphing Example 2
How to Fix Graph Mode on a TI-89 Calculator
Graphing Quiz

Zooming in Graph View for the TI-89

How to Zoom the Graph Viewing Window

Solving Linear Systems of Equation on the TI-89

Solving a Linear Systems of Equations Using the TI-89 Calculator
Example 1
Example 2
Example 3
Example 4
Solving Linear Systems of Equations

Matrix Operations on the TI-89

Performing Matrix Operations on the TI-89 Calculator

Solving Equations

Solving Equations (and finding zeros) on TI-89
Example 1
Example 2
Example 3
Example 4
Example 5
Solving Equations

Functions and the TI-89

Building a t-Chart
Evaluating a Function for a Number

Wrap Up

Summary and Well Wishes