Below is a portion of the graph of a function, y=f(x)
Suppose we define another function by g(x)=f(x+a). On the evidence of the graph above, for what choice of a is it true that g(x) is identical to its inverse, g^-1(x)?
Not positive....but if a = 2 the graph shifts leftward by 2 and becomes symmetrical about the x=y axis.