f(x)=x+4
This is saying the function is showing the input of x + 4. If we use a table for this, we would get something like this(see image). This is showing that y=x+4.
If you give the value of x, it shows the value of y. Let's say x=15. Here is our equation: y=15+4.
Let's add it together: y=19.
It says the function is 1:1, meaning that for every x it goes up, it also goes up 1 value of y.
Now for the inverse of a function. The inverse of a function reverses the function. So the inverse of y=x+4 would be x=y-4. this means for when you set the y value, it goes down by four and that would be your x. If my answer is incorrect, please explain the part of f^-1(x=. Thanks!
Here is an alternate possible answer:
f(x)=x+4
y=x+4
x=y-4
f^-1(x)=x-4
