Question

look at this table:

x	y
19	3
6	-19
5	4
17	9

is this relation a function?
yes no
submit
work it out
not feeling ready yet? these can help:
input/output tables: find the rule (8.5)
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), with no repeated x-values mapping to different y-values.

Step2: Check x-values for repeats

Examine the x-values: -16, 19, 6, 5, 17. All x-values are unique, so each x maps to only one y.

Answer:

yes