Final answer:
To model the total cost for tickets at Star Cinema, the equation y = kx is used where y represents the total cost, k is the cost per ticket, and x is the number of tickets.
Step-by-step explanation:
To model the total cost y for x tickets at Star Cinema, we assume that each ticket has a fixed price, and therefore the cost is directly proportional to the number of tickets. This sort of problem is commonly referred to as a linear relationship because the graph of tickets versus total cost would be a straight line. Using the format of a linear equation y = kx, k represents the cost of one ticket. Without specific information on ticket costs, we can only leave k as an unknown constant in this equation.
So, the equation to model the total cost y for x tickets would be y = kx, where k is the cost per ticket and x is the number of tickets purchased. To find the exact value of k, you would need to know the cost of a single ticket at Star Cinema.