Algebra-1

Let's analyze each relation to determine which ones describe a function and why:

A. This relation describes a function. Each input (-12, 5, -3) from the domain is mapped to a unique output (9, 3, 10) in the range. 

A function allows each input from the domain to have exactly one output in the range, but the same output can be shared by multiple inputs. Therefore, “Each member of the range is unique.” is not correct.

B. This relation does not necessarily describe a function based on the positivity of domain and range elements. However, it does describe a function because each input (3.5, 1.1, 4.6) from the domain is uniquely map...