Final answer:
The amount of garbage produced by a city can be expressed using function notation as G(p) = 12 + (p - 50) / 1000, where G(p) represents the amount of garbage and p represents the population in thousands of people.
Step-by-step explanation:
The information given can be expressed using function notation as follows:
G(p) = 12 + (p - 50) / 1000
Where G(p) represents the amount of garbage produced by the city and p represents the population in thousands of people.