Question

Find the inverse of function f

f(x) = 4 - 9x

A. f¹(x) = -1/9x + 4/9
B. ƒ¹(x) = -1/9x + 1/4
C. f'(x) = 9/4x
D. f(x) = 9x + 4

Answer 1

A)

Explanation:

1st we make the equation like that

y=4-9x

and then replace the y with x "switch the x and y."

x=4-9y

and then make the y a lone in a side aka solve for y

9y=4-x -----> y=(4-x)/9 -----> -1/9 x +4/9

and then that's the inverse...