Question

Please help!!


Find the inverse of y=7x-10. Is the inverse a function?

Answer 1

Explanation:

y=7x-10 calculate x : 7x-10 =y

7x = y+10

x = 1/7 y +10/7

the inverse of y=7x-10 is ; y = 1/7 x +10/7

Answer 2

Answer:
`f^(-1)` (x) =
`(x+10)/(7)`

Explanation:

To find the inverse , all we need do is to make x the subject of the formula.

y = 7x - 10

Add 10 to both sides

y + 10 = 7x

divide both sides by 7

Therefore:

x = y + 10 / 7 , that is

`f^(-1)` (x) =
`(x+10)/(7)`