The TI-84 is a graphing calculator designed to assist students in more complicated areas of math. For example, you may want to solve a system of equation by substitution, in which you assume the value for one variable and solve for the other. The "STO'" button helps you with solving these types of equations, storing a particular value as "x," for example, and using this information when you type in the full equation to solve.
Instructions
-
-
1
Press "ON" to power on your calculator. This is the lower leftmost button on your TI-84.
-
2
Type in the number you wish to define "x" as.
-
-
3
Press the "STO'" button, located between your "ON" and "LN" keys in the first column.