Is the relationship a function? (Show work if possible)

Answer: No! This is not a function!
Step-by-step explanation:
Functions. Terms. Domain - The set of all inputs of a relation or function. Function - A relation in which each input has only one output. Often denoted f (x). Horizontal Line Test - If every horizontal line you can draw passes through only 1 point, x is a function of y.
Step-by-step explanation:
This is not a function. This is not a function because the input (3) has 2 outputs which is 18 and 15.
I hope this helps! Have a good day!