Question

determine if the following examples are functions or not

Answer 1

Answer:

Step-by-step explanation:

Simply, a function is a relation from a set of inputs X (domain) to a set of possible outputs Y (range), where each input is related to exactly one output.

- Relation 1 is a function;

- Relation 2 is NOT a function. (-2, 0) and (-2, 5) show that one input "-2" is related to two different outputs 0 and 5;

- Relation 3 is a function;

- Relation 4 is NOT a function. (-4, j), (-4, n), (-4, r) show that one input "-4" is related to three different outputs j, n, r.