Question 188091: which of the following relations is a function?
{(3,4),(-3,1),(4,4),(0,7)}
{(0,4),(-3,1),(2,-4),(0,7)}
{(4,4),(-3,1),(4,-4),(0,7)}
{(2,4),(3,1),(3,-4),(-3,7)}
Answer by Mathtut(3670)   (Show Source):
You can put this solution on YOUR website! {(3,4),(-3,1),(4,4),(0,7)}
:
remember in a function there can be one and only one y value for each x value
in the other 3 there is two values of y for a given x......for instance
in the 2nd grouping you have (0,4) and (0,7) so for x=0 you have y=4 and 7....
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