How does a business determine the markup on a product or service? by matching the closest competitor

by checking online prices

by calculating the profit that will keep the business going

by considering how much the product is worth to the consumer

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

What numbers are included in the set of integers? what numbers are not included?

What is the equation of a line passing through (-6,5) and having a slope of 1/3