Which of the relations given by the following sets of ordered pairs is not a function?
select one:
a. {(52)}
{
(
5
,
2
)
,
(
4
,
2
)
,
(
3
,
2
)
,
(
2
,
2
)
,
(
1
,
2
)
}
b. {(−4,−−1,−,,,10)}
{
(
−
4
,
−
2
)
,
(
−
1
,
−
1
)
,
(
3
,
2
)
,
(
3
,
5
)
,
(
7
,
10
)
}
c. {(−8,−−6,−−4,−−2,−−1,−4)}
{
(
−
8
,
−
3
)
,
(
−
6
,
−
5
)
,
(
−
4
,
−
2
)
,
(
−
2
,
−
7
)
,
(
−
1
,
−
4
)
}
d. {(−6,−3,−,,−,3)}