F(-2) if f(x) = 3x
2 + 5x - 8

Given the following statements, which is the best

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%.

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.