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

h (x) = x + 3

h (x) = x - 3

h (x) = x - 3

h (x) = x + 3

An inverse of a function can be found by flipping the x and y axis around in the function

So instead of y = x + 3, it would be x = y + 3.

Now you need to solve for y and as a result you should get y = x - 3 [or h (x) = x - 3 when using function notation]