Given the relation :

We will use the given relation to complete the table
We need to find the value of n when m = 40
so, substitute with m = 40 , then solve to find n

So, when m = 40 , the value of n = 8
Now , we need to find n when m = 50
Using the same steps before
So, n = 50/5 = 10
So, the table will be as shown :