Question 180810: Determine whether the relation is a function.
{(-1, -9), (1, 5), (6, -3), (7, -4), (10, 2)}
Found 2 solutions by jim_thompson5910, eperette:
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! Notice how every ordered pair has distinct x values (ie no two "x" values are the same). So this means that EVERY x value of the relation goes to only ONE value. This means that the relation is a function. If you are not sure, plot the points and perform the vertical line test.
Answer by eperette(173) (Show Source):
You can put this solution on YOUR website! There are different ways to remember if a relation is a function, when given sets of points the best method to use is to make sure the x-values do not repeat
(-1, -9)
(1, 5)
(6, -3)
(7, -4)
(10, 2)
If you look down, there are no x's repeating so this is a function
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