Answer:
c. The mapping represents y as a function of x, because each x-value is related to exactly one y-value.
Step-by-step explanation:
A mapping can be considered to be a function if any of the following conditions met:
1. Every x-value has exactly only 1 possible y-value mapped to it.
2. Two or more x-values can be mapped to the same y-value provided each x-value is not having more than 1 y-value. That is, provided condition 1 is maintained.
Now looking at the mapping given, every x-value you see there is mapped to exactly just 1 y-value. No x-value is mapped to more than 1 y-value.
However, 3 different x-values, -3, 0, and 8, have the same y-values, 4. This also fulfills the condition for a mapping to be regarded as a function, as a y-value of a function can have more than 1 possible x-value mapped to it.
Therefore the mapping represents y as a function of x.