Press "2nd" and "x-1" to launch the matrix function. This button is located in the first column and fourth row down on the calculator.
Scroll over to "Edit" using the arrow keys and press "Enter" to select it.
Set the number of rows and columns for the problem. For example, if your problem was 4 columns by 4 rows, you would push "4", "Enter", "4", "Enter."
Input the numbers from your matrix starting in the top left and moving left to right, top to bottom.
Press "Y=" to launch the graphing function of your calculator, and press "Clear" to delete any previous data that was entered.
Highlight "\Y1=" and press "2nd" and "x-1" to input your matrix into the field. Your calculator will now say "\Y=MATRX."
Press "Graph" to graph the matrix.