Final answer:
The number of cars rented per day when the rental price is $80 is 490.
Step-by-step explanation:
To find the number of cars rented per day when the rental price is $80, we need to substitute the value of p into the linear function n(p) = 1050 - 7p. So, n(80) = 1050 - 7(80). Simplifying this expression, we get n(80) = 1050 - 560.
Next, we subtract 560 from 1050 to find the number of cars rented per day. n(80) = 1050 - 560 = 490.
Therefore, when the rental price is $80, the number of cars rented per day is 490.