Answer:
Step-by-step explanation:
domain is x = input = {3, 6, 12, 18}
Range is y = output = {5, 7, 9, 10}
for x = 6 y has two values y = 5, 10
so it is not a function
do you have any more information?
46
69/3 = 23 (1/3 of the customers)
23×2 = 46 (2/3 of the customers)
im pretty sure the answer is 30