Question

The inverse of the function f(x) = 1/2x + 10 is shown.

Answer 1

We have to find the inverse of the function:
f ( x ) = 1/2 x + 10
y = 1/2 x + 10
- 1/2 x = - y + 10   / * ( - 1 )
1/2 x = y - 10   / * 2
x = 2 y - 20
f^(-1) ( x )= 2 x  - 20
h ( x ) = 2 x - 20 
Answer:
The missing value is 20.