Question

What is the inverse of the function

Answer 1

y = (x - 1) / 2 (First answer choice)

Explanation:

1) Start with f(x) = 2x + 1

2) Replace f(x) with y: y = 2x + 1

3) Interchange x and y: x = 2y + 1

4) Solve this result for y: 2y = x - 1, or y = (x - 1) / 2 (This matches the first

answer choice.)