Advanced TI-30XS Calculator Operations

This calculator is capable of doing some algebra and statistics operations.  If you are comfortable with the calculator, you may find these methods easier than doing them by hand.


Storing Variables


Variables can be stored in your calculator.  This function can be helpful if you have an algebra expression and are told the value of the variables.  If you want to store a variable as x, enter the number amount, then press the ‘sto->’ key, then the ‘xyztabc’ key.  If you would like to store an amount for other variables, you can store them as x, y, z, t, a, b, or c by pressing the ‘xyztabc’ button repeatedly to scroll through the variables.  Then, enter the expression you would like simplify by pressing the ‘xyztabc’ button for each variable.  This can also be used for geometry formulas, though you will need to assign the variables the calculator knows instead of the ones in your formula.  After you have stored an amount for a variable, it will stay in your calculator until you store a different amount for that variable.








The Data Function


The data function on the calculator can be used to deal with a list of values.  If you would like to find the y values for a list of x values in an equation, first set the equation in y= form.  Let’s use the equation y = 2x + 3.  On the calculator, press the ‘data’ button.  You should see a table with three columns and your cursor will be in the first ‘L1’ column.  Enter you x values here.  If you want to try 3, 2, 1, 0, -1, type in each value and press enter after each one.  Then, scroll right so your cursor is on the ‘L2’ column.  Now, press ‘data’ again.  Scroll to the right to highlight the word ‘FORMULA’ and press enter.  Then enter your equation, except instead of entering x, press data again and scroll down to ‘L1’ and press enter.  Continue entering your equation and press enter.  It should look like 2 * L1 + 3.  Your L2 column should fill up with the y values for each x, and if you are making a graph, you can plot each of these ordered pairs.  To clear a line of your table,  press ‘data’ again, then enter on the word clear.  To clear all data, press ‘data’ then the number 4.













If you have a list of values that you would like statistical information on, enter your values in the data L1 table in the data function.  Then, press ‘2nd’ and ‘data’ again for the ‘stat’ function.  ‘1 var stats’ should be highlighted.  Press enter.  Then enter three more times for ‘L1,’ ‘ONE,’ and ‘CALC.’  You will then get a list of statistical amounts that you can scroll through.  The first value is the number of values you entered.  The second one (an x with a bar over it) is the mean.  The third and fourth values are standard deviations.  The fifth is the total of the values.  The sixth is the total squared.  The seventh is the minimum or smallest value, eighth is the first quartile, ninth is the median, a is the third quartile, and b is the maximum or largest amount.