Answer: z-1 (6) = 0
Step-by-step explanation:
I suppose that the notation:
(z-1)(x) refers to the inverse function of z(x).
Now, by definition, we know that:
if z(x) = y
then z-1(y) = x.
Now we want to find the value of z-1(6)
This value will be equal to the input that we need have:
z(x) = 6.
By looking at the graph, we can see that the value of the function is 6 when x = 0.
then:
z (0) = 6
This implies that:
z-1 (6) = 0
