Answer:
The graph has a closed circle at 10
Step-by-step explanation:
Let
x ----> the number of rentals
The phrase "no more" means "less than or equal to"
so
The inequality that represent this situation is

solve for x



The number 10 is included in the solution
therefore
The graph has a closed circle at 10
That would be C....(1 x 10^-1) + (6 x 10^-2) + (9 x 10^-3)
3n+1 is the answer
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X is something you could factor out or 4x