Question

look at this table:

x	y
13	8
7	18
7	3
7	4

is this relation a function?

yes no

Explanation:

A relation is a function only if every input (x-value) has exactly one corresponding output (y-value). In the table, the x-value 13 maps to both -6 and 8, and the x-value 7 maps to 18, 3, and 4. Since multiple y-values are paired with single x-values, this relation does not meet the definition of a function.

Answer:

no