# What Does Rref Mean on a Graphing Calculator?

Maybe you are newer to this word rref, what does it mean? It is the abbreviation of reduced row echelon form.

In some of the situations when our text fails to define rref, so rref function makes it able to define.

In the graphing calculator, this function is available, which helps to transform any of the matrixes into a reduced row-echelon form which is the basic function, look at this website.

We also use Scilab notations on the matrix for basic row functions.

## What are the benefits of the rref function in graphical calculators?

We find rref helpful for identification of the bases of functions of the column and row space of a matrix, the basis of the row space is essential for the rows of the rref and col spaces are essential for the columns of rref original matrix.

But while using simple text, it doesn’t seem easy to identify, but rref makes it simple to identify and helps find the solutions of the variables involved in the matrix.

### Why do we need to reduce the matrix to echelon?

We need to reduce the matrix to echelon for many reasons such as

We want to make a check on the matrix that is it irreversible and can find its inverse. Because when we perform this basic operation to the matrix, then we are multiplying the set of matrices.

With multiplication results, we come to know that is the matrix inverse or it is inverse of other matrices.

The other reason for reducing the matrix to echelon is to get a Cartesian equation of the image of F:X—AX+B and become able to find a point of that image. It makes it possible for us to get a parametric description of the antecedent.

The third reason for reducing the matrix to echelon is to extract a base of the images.

### Is it advantageous for the Real-world?

In the real world, the main advantage of this function is to simplify our problems in different conditions, such as when you have a fewer number of equations variables.

In some conditions where the dimension of the problems are too high for the simple calculus, which makes it unable to solve? In such times this function work for us to solve our problems and get the required results to apply to real-world problems.

These problems are mostly finding in the finance areas where we are trying to set some pricing options.

### How rref present on graphical calculators?

In the graphical calculators, rref is used by pressing the rref command in the following ways.

For entering the matrix in the rref you will need to press y it will give you access to the matrix menu, then go to the user menu, and then to the EDIT.

Now press the dimension of the matrix such as A or any name that you have for the matrix.

Next to that, you will need to enter the dimensions of matrix A such as 2 x 4, after that enter the values which you see in the matrix.

For entering the values, you will need to press Í after each entry. Once values are entered by following instructions, press yz to QUIT, it will return you to the main screen.

### How to find reduced row echelon form?

Start pressing with Y and get access to the matrix menu, then using ~ go to Math, then use † to select B. to follow the above method as we follow for matrix A in the above content.

I have once done press Í, to calculate the rref of an augmented matrix.

#### Final Thoughts:

You have read about rref; it is one of the essential functions in graphical calculators which make us solve many of the problems which seems difficult to solve with simple calculus. You can get results for difficult, matrices and can apply the results in real-world situations.