Question 764994
Here is the graph of  f(x)=3-x^2
{{{ graph( 300, 200, -5, 5, -5, 5, 3-x^2) }}}
f(x) is increasing over the interval (-3,0)
f(x) is decreasing over the interval (0,3)
f(x) reaches a maxima at 3, namely the point on the graph (0,3)