fill in the blank with the correct answers to make the given statement true

1_____can be set of ordered pairs the ______of the relation is the set of the first coordinates and the_____is the set of the second coordinates
2___is a relation in which each element of the domain corresponds to exactly______element of the range
3.The members of the domain can be called as____and the members of the domain can be called as____
4.A___function ot a compound function defined by multiple functions where each function applies to a certain interval of the main function's domain​