Question

look at this table:
x | y
19 | 14
12 | -11
8 | 3
8 | 7
is this relation a function?
yes no

Explanation:

Step1: Recall function definition

A relation is a function if each input (x - value) has exactly one output (y - value).

Step2: Check x - values

In the table, the x - value 8 appears twice, with corresponding y - values 3 and 7. So, the input 8 has more than one output.

Answer:

no