Grahping with your TI-83

1.  Press
 Y = 
A Make sure plot 1, 2, 3 at the top of the screen are not highlighted unless plotting statistics.
     To remove highlight, move cursor to highlighted feature and press 'ENTER'.
B Move cursor left of Y = on screen to change LineStyle press enter to cycle through line styles.
C Enter desired function next to Y =
Press
X,T,q,n      Use this key for x.
     ie:  \Y1 = (x-4) ^ 2 - 2
Press
GRAPH
 
Press
ZOOM
D  Select 5: ZSquare
E  Deselect function by placing cursor over the = and press enter.
F Items selected from menus go directly to cursor position.
ie:       \Y = [cursor]
MATH
>
ENTER
gives:  \Y = abs(x-4)^2-2

Now type in the function: \Y = abs((x-4)^2-2)
 
2.
GRAPH
With \Y =
abs( (x-4) ^2 - 2)
Press
GRAPH
 
Press
ZOOM
Select 6: ZStandard to get a normal screen.
or Press
ZOOM
Select 0: Zoom Fit to get another view.
or Press
ZOOM
> Highlight MEMORY and select 1: ZPrevious
Press
WINDOW
and enter the following values: 
Xmin = -2
Xmax = 10
Xscl = 2
Ymin = -2
Ymax = 10
Yscl = 2
Xres = 1
Press
GRAPH
Press
ZOOM
Select 1: ZBox move cursor left of the Y axis.
Press
ENTER
Move cursor to right lower corner of screen.
Press
ENTER
 

Experiment with other zoom features on your own!!