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Give an example of a relation that is NOT a function and explain why it is not a function?
Wiki User
∙ 12y ago
y² = x
--> y = ±√x
Because there are *two* square roots for any positive number (positive and negative) this will not be a function.
Wiki User
∙ 12y ago
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A function is an equation that gives a unique answer. A relation does not. Example: y = 3x + 1 is a function. If I give you x, you can determine y. And that y is unique to that x. So if x = 1, you know y = 4. No other of x gives y = 4 as an answer. So y = 3x + 1 is a function. Example: y = 4x2. So if I give you x = 1, y = 4. But y = 4 if I also give you x = -1. So y = 4x2 is not a function, it is a relation.
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