Question 62155
Graph each quadratic function: 
f(x) = 1/2x^2 - 2 
:
y = .5x^2 - 2
:
Substitute values for x and find y, I did a few of them for you.
an example; when x = -4
y = .5(-4^2) -2
y = .5(16)
y = 8 - 2
y = +6
:
 x | y
-------
-4 |+6
-3 |+2.5
-2 |____
-1 |____
0  |____
+1 |____
+2 |  0
+3 |+2.5
+4 |_____ 
:
Complete this table and plot these x,y points on a graph
it should look like this:
{{{ graph( 300, 200, -6, 6, -4, 6, .5x^2 - 2) }}}
:
do you understand this now?