To find the inverse of a function, I usually follow these easy steps:

1. Start with the Function: Let’s take a function like $f(x) = 2x + 3$.

2. Change $f(x)$ to $y$: Now, we change it to $y = 2x + 3$.

3. Switch $x$ and $y$: Next, we swap $x$ and $y$. This gives us $x = 2y + 3$.

4. Solve for $y$: Now, we want to get $y$ by itself. First, subtract 3 from both sides: $x - 3 = 2y$. Then, divide by 2 to find $y$: $y = \frac{x - 3}{2}$.

5. Write the Inverse: Finally, we can write the inverse as $f^{-1}(x) = \frac{x - 3}{2}$.

This method works for most functions.

Keep in mind, though, not all functions have inverses.

You should check if the function is one-to-one.

You can do this by using the horizontal line test!