What is a function and how can it be repreented

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

How do you summarize data in a two-way frequency table?

What’s the answer ? use the picture to see the problem