The value of a function is found by using the F(x) option.

While viewing a graph, press to view the math menu.

Move the cursor to the desired x coordinate and press to select the F(x) option.

The y coordinate of the function appears at the bottom of the screen and is added to the stack. Here, the value is at about 0.538.

To evaluate the function for a very spicific value of x go to the stack and put the desired value on the top.

Type the name of the indepentant variable, probably x, as an algebraic expression (ie.

`'X'`

) and
type . Type

`EQ`

then .
If there is more than one equation, drop the stack until you get to the
equation you wish to evaluate and press .
The value of the equation for that particular x will be put onto the stack.