The graph shows the production of cars per day at a factory during a certain period of time. What is the domain of this function during this period? (1 point)
Cars
Car production
500
400
300
200
100
.
Days
1
2
4
5
6
7
8
9
Оа
The domain is all real numbers 0 through 9.
Oь
The domain is all integers 0 through 9.
Ос
The domain is all positive real numbers.
Od
The domain is all positive integers.