SOLUTION: can someone please help me with this problem: Determine whether the relation is a function. {(-6,-3),(-6,-9),(2,-6),(4,4),(8,-3)} a. function b. not a function

Question 160123: can someone please help me with this problem:
Determine whether the relation is a function.
{(-6,-3),(-6,-9),(2,-6),(4,4),(8,-3)}
a. function
b. not a function
Answer by midwood_trail(310) (Show Source): You can put this solution on YOUR website!
If you find a duplicate x-value, then the different y-values mean that you do not have a function.
Your question:
Determine whether the relation is a function.
{(-6,-3),(-6,-9),(2,-6),(4,4),(8,-3)}
a. function
b. not a function
All x values: -6, -6, 2, 4, 8
All y values: -3, -9, -6, 4, -3

If you notice that there are two points with the same x value of -6.
Point (-6, -3) and point (-6, -9) both have the same -6 value for x.
See it?
When two or more points have the same x value, then there is no function.
The answer is b = not a function.
Did you follow?

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