Question

look at this table:

x	y
1	17
13	7
-17	4
15	7

is this relation a function?

yes no

Explanation:

Step1: Recall function definition

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

Step2: Check $x$-value duplicates

Look for repeated $x$-values: $x=1$ appears twice, with $y=1$ and $y=17$.

Step3: Verify function condition

Since $x=1$ maps to two different $y$-values, the relation fails the function test.

Answer:

no