Question

determine whether the relation is a function.
$c=\\{(8,1), (-8,-5), (2,-1), (4,-8)\\}$

is the relation a function?
no
yes

Explanation:

Step1: Identify input (x) values

The x-values are $8, -8, 2, 4$.

Step2: Check for repeated x-values

All x-values are unique; no duplicates.

Step3: Apply function definition

A relation is a function if each input has exactly one output.

Answer:

Yes