Answer:
C One input value is mapped to two different output values.
Step-by-step explanation:
Relations and Functions
A relation is a function if each input value maps to only one output value.
The relation shown in the figure is not a function because element 1 in the input set maps to two values in the output set (1 and 2).
From the following, the option that best explains why the relation is not a function is:
C One input value is mapped to two different output values.
