Question 611049
To graph the function {{{f(x) = -x^2}}}, you can start by evaluating various points on the graph and plotting those points. For example, if you construct a table similar to:

x       |       -x^2
--------------
-2     |       -4
-1     |       -1
0       |        0
1       |       -1
2       |       -4

That should be good enough for this graph since there is one critical point on this function, namely f(0) = 0. As x approaches either positive infinity or negative infinity, the function value, f(x), approaches negative infinity.

{{{graph(800, 600, -5, 5, -25, 1, -x^2)}}}