Question

The mapping diagram above ( does NOT represent or represent) a function since ( for each number or there is one number) in ( set A the out put, set B the input, set A the input, set B the output) where there ( is no mapping, is only one mapping, are multiple mapping), ( from set A the input, from set A output, to set B the output, to set B the input).

Answer 1

Remember that

The data set is a function if every element of the domain corresponds to exactly one element of the range

In this problem

the relationship between A and B does not represent a function, because

for one value of set A, there are two values of set B

example

set A ----> -4 -----------> correspond 3 and 2 values of set B

therefore

the answers are

does NOT represent a function

there is one number in set A

where there are multiple mapping

from set A the input, to set B the output