Final answer:
The linear function that represents the total cost when x tickets are ordered is c = 5x + 5.50.
Step-by-step explanation:
The linear function that represents the total cost, c, when x tickets are ordered is given by the equation:
c = 5x + 5.50
In this equation, x represents the number of tickets ordered. The fixed cost of $5.50 is added to the product of the number of tickets ordered and the set price per ticket, which is $5.
For example, if x = 5 (5 tickets are ordered), the total cost c would be:
c = 5(5) + 5.50 = 25 + 5.50 = 30.50
So, the total cost for ordering 5 tickets is $30.50.