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.

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.

anonymous · Answer

the answer is B

anonymous · Answer

to define function every x have just one y ;( if x in the interval definition)

anonymous · Answer

It's also D

anonymous · Answer

yea with D

cwrw238 · Answer

yes D is a many-to-one relation which is also a function

anonymous · Answer

A and C , in the point you can see that x have two different value '

cwrw238 · Answer

A and C are one-to-many relations -  NOT a function

anonymous · Answer

Thanks!