Question

Which relation describes a function? What makes it a function?












A)
{(2,3),(3,3),(3,4)} Each member of the domain and range is positive.



B)
{(-2,3),(-4,5),(-6,7)} Each member of the domain and range is unique.



C)
{(2,3),(3,3),(3,4)} Each member of the domain and range is a real number.



D)
{(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range.

Answer 1

if in the realtion x values repeat then relation is not fuction
in order to be function
there should be no x's repeat
for example
(a,b)(a,c)(c,d)
in this relation a is two times so this relation is not function

Answer 2

@1497 did you understand ??

Answer 3

yes I go with b

Answer 4

by looking at relations
it can be B or D

Answer 5

you have to read the statement too

Answer 6

for function only thing matter
is X values
if there is x repeat then not function

Answer 7

according to the statement of D
is this right ??