Question

Select the correct answer.
What is the inverse of function f?
ƒ(x) = 10/9x + 11

Answer 1

D. f(-1)x = (10x - 110)/9

Explanation:

let y = 10/9 x + 11

10/9 x = y - 11

x = 10/9 y - 110/9

= (10y - 110)/9

Replace the x by f(-1)x and the y by x:

f(-1)x = (10x - 110)/9