Question

{(-1,-2)(0,-1)(1,5)(2,-1)(3,5)}
Is the relationship in the table above a function? Explain how you know.

Answer 1

it is a function; every domain value has only one range value.
if there were 2 or more of the same domain values (ex (5,2) and (5,7), and (5,19)) then, it is not a function.