Question

look at this mapping diagram:
domain
4
-10
9
range
12
16
9
is this relation a function?
yes
no

Explanation:

Step1: Recall function definition

A relation is a function if every element in the domain maps to exactly one element in the range.

Step2: Check domain elements

• 4 maps to 9 (one output)
• -10 maps to 16 (one output)
• 9 maps to 12 (one output)

All domain elements have only one corresponding range value.

Answer:

yes