Question

Which relation describes a function? What makes it a function?
A) {(-2,3),(-2,5),(-6,7)} Each member of the range is unique.
B) {(2,3),(3,3),(3,4)} Each member of the domain and range is positive.
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

Answer:

The relation in (D) is a function.

Hope this helps...

A) This is not a function.  The domain value "-2" has more than one range value (3 and 5) related to it.

B) This is not a function.  The domain value "3" has more than one range value (3 and 4) related to it.

C) This is not a function.  The domain value "3" has more than one range value (3 and 4) related to it.

D)  This is a function.  As it says, each member of the domain (-2, -3, -4) is related to exactly one range value.  What those values are is not important, so the fact that they all happen to be the same is irrelevant (all of -2, -3 and -4 in te domain are related to the same value 3 here).  All that matters is that each domain value turns up exactly once.

Answer 2

Answer:

D

Step-by-step explanation: