Answer
Another function value is ƒ(-3) = -6.
Work Step by Step
For all $x$, ƒ$(-x)$ = -ƒ$(x)$, shall mean that the graph of an equation is the same as the graph of $y$ = ƒ$(x)$ which is symmetric with respect to the $y$-axis and reflected across the $x$-axis.
So, for ƒ(3) = 6, another function value is ƒ(-3) = -6.
