Question

2)

x	g(x)
5	12
-4	18
9	52
0	-21

function?

1. ... (partially visible chart with x and g(x), and row 13, 12)

Explanation:

Step1: Recall function definition

A relation is a function if every input $x$ has exactly one output $g(x)$.

Step2: Check unique x-values

Examine all $x$-values: $3, 5, -4, 9, 0$. Each $x$ appears only once, so each has one corresponding $g(x)$.

Answer:

Yes, this relation is a function.