Answer: it is a function because there aren't for example two 4's that don't have a y value that is a for example 0.
Step-by-step explanation:
Answer:
362+54=416+m m=cost after month 1
20-x; -20+x; -20-x; 20+x
|14-x+6|
|20-x|
81 = 9^2
I hope it's help you...
Thanks♥♥
