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January 27, 2015

January 27, 2015

Posted by **Cheryl** on Monday, May 2, 2011 at 10:04am.

Here is an example can you tell me how to determine this? D:

Example:

Determine whether the relation is a function. {(-5,5), (-2,5), (0,5), (2,5)}

Thanks in advance

- Pre-Algebra -
**bobpursley**, Monday, May 2, 2011 at 10:08ama funcion has a one to one relationship.

here, for each x, it maps into a single distinct y. Each x here maps to a y.

Now, the reverse: is x a function of y? No, because for y=5, x can be -5, -2, 0, or 2. x is not a function of y.

What if you had added the point (-5,4)? Then y would not be a function of x, because if x=-5, it maps into both 4, and 5. Not a function then

- Pre-Algebra -
**Cheryl**, Monday, May 2, 2011 at 10:13amThanks

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