Learning Objectives:

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__Matrices on the Graphing Calculator__

A **graphing calculator** is a handheld device that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables. **Graphing calculators** are generally programmable. So the user can create customized programs for science, engineering and education applications. Because they have large displays, it can display several lines of text and calculations at the same time. On using the **graphing calculator** the goal is to be able to turn the **graphing calculator **on and off and also to cover how to enter various expressions on the **graphing calculator** including **fractions, exponents, radicals, scientific notation, evaluating expressions, matrices, logarithms and regression. **To find the **matrix of reduced row-echelon form** following are the steps:

1.To scroll to the ref( function in the **MATRX MATH** menu, press.) 2.**Press [ENTER] **to paste the function on the **Home screen. **3.**Press [2nd][x–1]** and** press [3]** to choose the **augmented matrix **you just stored.

4.**Press [ENTER]** to find the solution.

**Hook Questions**

*1. **How do you put matrices in a TI 84?*

*2. **How do you find the inverse of a matrix on a calculator? *

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