The graph of 
is shown below in red. Given that 
is invertible, find 
. 
(Assume grid lines are spaced 1 unit apart.)
+130511 Notice that the point (3,4) is on f(x)....and the inverse graph just "reverses" the coordinates....so....(4, 3) is on the inverse...this means, when we put "4" in for "x" in the inverse, it returned '3"
Therefore.....using f-1(x) and substituting "4' for "x" we have ...... f-1(4) = 3
+130511 Notice that the point (3,4) is on f(x)....and the inverse graph just "reverses" the coordinates....so....(4, 3) is on the inverse...this means, when we put "4" in for "x" in the inverse, it returned '3"
Therefore.....using f-1(x) and substituting "4' for "x" we have ...... f-1(4) = 3
