Answer: The demand function is:

Step-by-step explanation:
The linear demand function is as follows:
P = a - bQ ⇒ (1)
Where,
p - price
Q - Quantity
a - intercept value
b - slope coefficient
From the given data, we have the following two equations:
10 = a - b(27,000) ⇒ (2)
8 = a - b(33,000) ⇒ (3)
By solving the equations (2) and (3), we get
a = 19 and b =

So, the demand function is as follows:
putting the values of 'a' and 'b' in equation (1), we get
