Question

x | y
0 | 0
-2 | 15
1 | 5
19 | -3
6 | -1
7 | 2
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

Check each x - value: 0, - 2, 1, 19, 6, 7. All these x - values appear only once, so each x is paired with exactly one y.

Answer:

yes