Question

question 1 of 21 (1 point) | question attempt: 1 of unlimited
pencil -2 -7
door 9
function
not a function
-2 -7 -2 9
function
not a function
relation 3
{(f, =), (=, m), (r, m), (m, m)}
function
not a function
relation 4
{(2, d), (2, a), (-6, d), (9, d)}
function
not a function

Explanation:

Step1: Recall function definition

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

Step2: Analyze Relation 1

The inputs "pencil" and "door" have unique outputs (-2, -7 for pencil and 9 for door), so it's a function.

Step3: Analyze Relation 2

The input -2 has multiple outputs (-7, -2, 9), so it's not a function.

Step4: Analyze Relation 3

Each first - element in the ordered - pairs (f, c, r, m) has a single corresponding second - element, so it's a function.

Step5: Analyze Relation 4

The input 2 has two outputs (d, a), so it's not a function.

Answer:

Relation 1: Function
Relation 2: Not a function
Relation 3: Function
Relation 4: Not a function