The most authoritative answer in 2024
-

-
Charlotte Gonzalez——Studied at the University of Zurich, Lives in Zurich, Switzerland.
A relation from a set X to a set Y is called a
function if each element of X is related to exactly one element in Y. ... This is a
function since each element from X is related to only one element in Y. Note that it is okay for two different elements in X to be related to the same element in Y.
read more >>
About “A relation、function、function”,people ask:
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.