Answer
The graph for $y=f\left( -x \right)$ can be found by reflecting the graph of $y=f\left( x \right)$ about the $y-axis$.
Work Step by Step
The values of the functions are obtained corresponding to each value of x in its domain.
Now, when we will replace x by –x in the function, the values obtained at x will be obtained at –x in the graph. Thus, we will obtain a graph reflected about the y-axis.
