Value Option
The value option is used to evaluate a selected function for a particular
value of x. While viewing a graph, press
.
Type 
or 
.
"Eval x = ?" appears at the bottom of the screen.
Type a value of x. For x = 2, type "2" and the corresponding value of y
will be displayed.
The "1" in the upper right hand corner indicates that the first function is being
evaluated. The cursor on the graph indicates the location of the point (x,y).
Note: The typed value of x must be between the xmin and xmax values entered in the
window.
To evaluate function "2", press 
.
For function "3", press , again.
