You can notice that between each of the arithmetic sequence there is a addition of 2. So we know that to add a 2 to get the next value. We can write it as n(x) where n is a function where x is the number:
n is the function and x repersent the number which is given
We can write this function as: [tex]n(x)=x-2[/tex]
So if we input x = -5 we will get -7. If we input -11 we get -13.
