Answer:
p(x) = 38500 - 1500x.
Explanation:
The average attendance was 25000 when the ticket price at $9. The average attendance rose to 28000 when the price lowered to $7.
Therefore, if the demand function p(x) where, x is the value of each tickets is linear then we have p(9) = 25000 and p(7) = 28000.
Hence, the demand function will be given as
![(p(x) - 28000)/(28000 - 25000) = (x - 7)/(7 - 9)](https://img.qammunity.org/2021/formulas/mathematics/high-school/oqefi0wg1xrbde6vlek5e2je08kbzt9gpp.png)
⇒ p(x) - 28000 = 1500(7 - x)
⇒ p(x) = 28000 + 10500 - 1500x
⇒ p(x) = 38500 - 1500x. (Answer)