Question

look at this mapping diagram:
domain
7
8
3
10
18
range
15
11
-9
4
2
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

Verify each value in the domain:

• 7 maps to -9 (1 value)
• 8 maps to 11 (1 value)
• 3 maps to 2 (1 value)
• 10 maps to 4 (1 value)
• 18 maps to 15 (1 value)

All domain elements have only one corresponding range value.

Answer:

yes