What? Need answers. Plus, I can tell that your are doing this in class. Bad idea.
Answer:
the total cost is $67
Step-by-step explanation:
9 × 3 = 27 8 × 5 = 40 40 + 27 = $67
1. You have the function 
2. You know that
with
, because the division by zero is not defined. So ,
for
where
is a integer number.
3. Then, to find the domain of the function given in the problem, you must make 
Where
is odd number.
4. Therefore:

5. Finally, the domain is: 
The answer is: 
Y+1=-1(x-3) is point slope formula