Question

Determine whether the relation is also a function.

{(-7, 3), (-7, -9), (-1, 5), (4, -4), (7, -2)}

Answer 1

Because a function can only have one output for a given input, this is NOT a function. Note that -7 maps to 3 and -9, which violates the rule for functions: single UNIQUE output for every input value.