9p+36 plz help with my problem 10 points pl

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Chose the graph below that represents the following system of inequality’s

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%.