# How do you write the inverse of the function #y=x-12#?

##### 1 Answer

#### Explanation:

A function is a relationship between two variables.

For example your function is

It means that if I give a number to

Let's try:

if

When you invert the function you want to invert the relationship between the two variables. You insert a value for

Let's try: if

The relationship is

We can solve this adding

It seems that the inversion was done adding 12 on both sides.

We can generalize this to the initial equation

if we add 12 on both sides we have

This relationship tell us that for each value we assign to