Question 710794
<pre>
We start with this:

 x   Substitute    work      y    point to plot (x,y)  
-----------------------------------------------------
-4   y=(-4)²-4  =  16-4  =  12        (-4,12)
-3   y=(-3)²-4  =   9-4  =   5         (-3,5)
-2   y=(-2)²-4  =   4-4  =   0         (-2,0)
-1   y=(-1)²-4  =   1-4  =  -3        (-1,-3)
 0    y=(0)²-4  =   0-4  =  -4         (0,-4)
 1    y=(1)²-4  =   1-4  =  -3         (1,-3)
 2    y=(2)²-4  =   4-4  =   0          (2,0)
 3    y=(3)²-4  =   9-4  =   5          (3,5)
 4    y=(4)²-4  =  16-4  =  12         (4,12)  

Now we plot all those points:

{{{drawing(240,400,-6,6,-6,14, graph(240,400,-6,6,-6,14),

circle(-4,12,.1),locate(-4,12,"(-4,12)"),
circle(-3,5,.1),locate(-3,5,"(-3,5)"),
circle(-2,0,.1),locate(-4.5,1,"(-2,0)"),
circle(-1,-3,.1),locate(-4,-2.5,"(-1,-3)"),
circle(0,-4,.1),locate(0,-4,"(0,-4)"),
circle(1,-3,.1),locate(1.5,-2.5,"(1,-3)"),
circle(2,0,.1),locate(2,1,"(2,0)"),
circle(3,5,.1),locate(3,5,"(3,5)"),
circle(4,12,.1),locate(4,12,"(4,12)") )}}}

Now we draw a smooth u-shaped graph through those points:

{{{drawing(240,400,-6,6,-6,14, graph(240,400,-6,6,-6,14,x^2-4),

circle(-4,12,.1),locate(-4,12,"(-4,12)"),
circle(-3,5,.1),locate(-3,5,"(-3,5)"),
circle(-2,0,.1),locate(-4.5,1,"(-2,0)"),
circle(-1,-3,.1),locate(-4,-2.5,"(-1,-3)"),
circle(0,-4,.1),locate(0,-4,"(0,-4)"),
circle(1,-3,.1),locate(1.5,-2.5,"(1,-3)"),
circle(2,0,.1),locate(2,1,"(2,0)"),
circle(3,5,.1),locate(3,5,"(3,5)"),
circle(4,12,.1),locate(4,12,"(4,12)")  )}}}

That's it!

Edwin</pre>