Question

determine whether the relation is a function or not.
{(-9,7),(-9,-8),(2,2),(3,-6),(8,8)}

Answer 1

no, you have an x-value (-9) that maps to more than one y-value

Answer 2

No because for multiple values of y for same value of x. This is not possible with a function.

Answer 3

Remember, a function is a set of ordered pairs in which no two ordered pairs have the same first number.

Answer 4

In your example, you have two ordered pairs with the same first number so it cannot be a function.