Posted by **logan** on Monday, August 27, 2007 at 8:46pm.

This is a critical question..

Why does y=3 represent a function and x=3 does not

- Please bobpursley help.algebra 2 -
**bobpursley**, Monday, August 27, 2007 at 8:58pm
The first is a function of x as there is one y value for all x. At any x, y=3.

The second is not a function because there is no value of y defined for any x. At x=3, y can be any value, and at other x values, y is undefined.

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