Inverse funtion

Question

(25-9y)

--------

     5 

 

25-9y divided by 5

Answer 1

If you are trying to find the inverse function f^-1(y) then:

 

We have f(y) = (25-9y)/5

 

to find the inverse function we do the following:

1) replace f(y) with x

     thus gives x = (25-9y)/5

2)  Switch x and y in the equation giving

     y = (25-9x)/5

3). Solve for x

     25-9x = 5y

     9x = -5y + 25

     x = (-5y+25)/9

4). Replace x with f^-1(y)

     f^-1(y) = (-5y+25)/9

Answer 2

- 5 / 9  ( y - 25 ) 

Answer 3

Divide each term in the numerator by the denominator.

 

 

(25 / 5) - (9y /5) =

 

5 - (9y/5)

Answer 4

Long division, baby!