Determine whether each relation is a function. Explain.
a. (-4, 4), (-3, 3), (-2, 2), (-1, 3), (0, 4)
Yes Each
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SOLUTION
a. Every input has exactly one output.
So, the relation is a function.
b.
Input, x 2 4 6 8 6
Output, y 4 3 2 3 4

b. The input 6 has two outputs, 2 and 4.
So, the relation is not a function.