The answer to your question is A) the first mapping. A function is a relation in which each and every element of X i.e. domain has a unique image in Y i.e. co-domain, because in the first mapping, element 2 is mapped to -3 and 5.
C. Andrew is a wrestler and needs to stay at a consistent weight. In order to do so, he follows the dietary recommendations of a dietitian carefully and always maintains a balanced diet
