which relation is a function?
a. (5,-2),(4,6),(-3,-2),(0,4)
b. (-1,-2),(3,-5),(-1,-5)(2,-2)
c. (4,3),(3,2),(-1,5),(4,0)
d. (-4,-4),(3,-3)(-4,4),(-3,3)

Question

which relation is a function?
a. (5,-2),(4,6),(-3,-2),(0,4)
b. (-1,-2),(3,-5),(-1,-5)(2,-2)
c. (4,3),(3,2),(-1,5),(4,0)
d. (-4,-4),(3,-3)(-4,4),(-3,3)

anonymous · Answer

A

chriss · Answer

A is a function because each x value is mapped to only one y value.  The other relations each have an instance of a single x value being mapped to multiple y values.

anonymous · Answer

CAn't have two same x values

directrix · Answer

Has to be a. (5,-2),(4,6),(-3,-2),(0,4)
Because
each of the other options have the same x going to different y values.