Question

Whats the inverse f(x)= -2x-9 ?

Answer 1

f(x)= -2x-9
let f(x)=y
y=-2x-9
Solve for x in terms of y,

Answer 2

x----> -2x-9
? <---y

y=-2x-9
x=y+9/(-2)

therefore, the ans is -(y+9)/2

Answer 3

(-x+9)/2 in terms of x

Answer 4

Thanks guys !