Question

look at this mapping diagram:
domain
19
-5
-2
-6
17
range
17
5
20
is this relation a function?
yes
no

Explanation:

Step1: Recall function definition

A relation is a function if each element in the domain is mapped to exactly one element in the range.

Step2: Check each domain element

• Domain element 19 maps to 17 (only one).
• Domain element -5 maps to 17 (only one).
• Domain element -2 maps to 5 (only one).
• Domain element -6 maps to 20 (only one).
• Domain element 17 maps to 5 (only one).

Each domain element has exactly one range element.

Answer:

yes