Question

look at this table:

x\ty
11\t11
19\t8
11\t2

is this relation a function?
yes no
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work it out
not feeling ready yet? these can help:
input/output tables: find the rule (83)
lesson: relations and functions

Explanation:

Step1: Recall function definition

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

Step2: Check x-values in table

The x-value 11 appears twice, with y-values 11 and 2. This means one input has two different outputs.

Answer:

no