Question

Based on the graph of z(x), what is the value of z-1 (6)?
z(x)

Answer 1

Answer: z-1 (6) = 0

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