Math
posted by Meow
For the following relations to be a function, x cannot be what values? Please enter your values in order from least to greatest.
a. { (7, 9), (6, 4), (x, 3), (1, 4), (0, 7) }
b. {14, 2), (x, 12), (4, 5), (2, 1), (16, 4) }

Reiny
If you see two or more ordered pairs with the same x value but different y valued, then the relation is NOT a function,
so what can x not be ??
e.g. suppose x = 1 , then we would have (1,3) and (1,4). That would be a nono
so x ≠ 1
What other values of x have that property?
Do the same for the second set of points.
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