Answer
The corresponding point on the graph is $\left( -a,b \right)$.
Work Step by Step
The graph of the function $y=f\left( x \right)$ is the reflection of the provided function $y=f\left( -x \right)$ along the y axis.
In the given case, the value of the function obtained earlier at x is now obtained at –x, so the graph looks like a mirror image of $f\left( x \right)$ along the y axis.
Therefore, the point $\left( a,b \right)$ on the graph of $y=f\left( x \right)$ corresponds to a point $\left( -a,b \right)$ on the graph of the function $y=f\left( -x \right)$.