A relation is a correspondence between two sets .A function is a correspondence between two sets such that to each element of the domain, there is assigned exactly one element of the range.
In the given table the set of points are (0,440),(1,428),(2,416),(3,404),
The domain of the given set is 0,1,2,3 .The range is 440,428,416,404.
For every domain there is one range so the given table represent a function .
YES.
