Answer:
Yup, it is indeed a function.
Step-by-step explanation:
As long as an input is <em>not</em> mapped to two or more outputs, it is a function.
In this web, no inputs are mapped to more than one output.
(x+y)
Thus, the HCF is (x+y).
127
3 x 7 + 5 - 2 - 3 + y
y = 106
3x7 = 21
21 + 5 = 26
26 - 2 = 24
24 - 3 = 21
21 + 106 = 127
