Answer:
1.A function is a relation which describes that there should be only one output for each input (or) we can say that a special kind of relation (a set of ordered pairs), which follows a rule i.e every X-value should be associated with only one y-value is called a function.
2.How to Determine if a Relation is a Function? ... If all the input values are different, then the relation becomes a function, and if the values are repeated, the relation is not a function.
