Posted by **Keyaria** on Thursday, March 29, 2012 at 7:36pm.

In which of the following sets of points is y a function of x? A= {(2, 2), (4, 6), (5, 3), (5, 1)} B= {(2, 2), (3, 4), (4, 4), (5, 4)} C= {(1, 4), (2, 3), (4, 4), (4, 1)} D= {(1, 4), (1, 5), (2, 6), (3, 5)}

- Math -
**Steve**, Friday, March 30, 2012 at 11:20am
recall that if y=f(x) is a function, each x value must correspond to a single y value. No two distinct points may contain the same x value.

A fails: (5,3) and (5,1)

B works - distinct x values

C fails: (4,4) and (4,1)

D fails: (1,4) and (1,5)

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