Texas Instruments TITANIUM TI-89 - Manual (Page 756)

Activities 756
5. In the Y= Editor , select the thick graphing
style for y2(x) .
6. Add the original function f(x) to y3(x) and
select the square graphing style.
7. In the Window Editor , set the window
variables to:
x= [ L 10,15,10]
y= [ L 100,100,10]
8. Draw the graph.
Note: Be sure the Graph mode is set to
Function.