What is the range of this graph, need help

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%.

W-16=-12 solve each one step equation plz

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom