Question

look at this table:
x | 4 | 4 | 19 | 19
y | -1 | 17 | 19 | 5
is this relation a function?
yes
no
submit

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

Examine the table:

• $x=4$ maps to $y=-1$ and $y=17$
• $x=19$ maps to $y=19$ and $y=5$

These $x$-values have multiple $y$-values.

Answer:

no