The relationship between any two numbers can be compared by selecting one of the test options. Press to view the test menu.

Press the menu key associated with a symbol.

Two numbers are taken off the stack and compared. A

Tests can also be made within algebraic statements such as

The result of such tests depends upon the value of the variable x. This type of comparison is often used to control the domain over which a graph is drawn. See note.

Put parentheses around the entire function and multiply it by each restriction raised to the power of -1, or divide by each restriction.

Press .

When the statements are true it simply multiplies the function by 1