Question

Which function is the inverse of f(x) = 2x+3?

Answer 1

f^-1(x)=x-3/2

Explanation:

we have f(x)=2x+3

let

y=f(x)

y=2x+3

Exchanges the variables x for y and y for x

x=2y+3

isolate the variable y

2y=x-3

y=x-3/2

let

f^-1(x)=y

f^-1(x)=x-3/2

Answer 2

Explanation:

The answer is B on Edgenuity

f^-1 (x) = 1/2x - 3/2