III. Working With Graphs

E. F5 - Math

1:Value This will evaluate the function at a particular value of x. However, the value entered must be in the interval [xmin, xmax].

Example: Enter the function and evaluate the function at x=-2.3 and x=1.7.

Press to access
the Y=Editor. Enter the
function.
Press to access
the Window screen and
enter the window shown.
Press to draw
the graph.
Press to access the
Math menu.
Select 1 and press enter.
This is the screen you will
see. Enter the value -2.3
or use the cursors to move
to that point.
Press ENTER and the
value of the function at
x=-2.3 is given. Notice that
the point is not shown on
the graph.
Now enter the number 1.7.
You do not have to go back
to the menu.
Press ENTER and the value
of the function at x=1.7
is shown.