The ordered pairs (1, 3), (2, 6), (3, 9), (4, 12) and (5, 15) represent a function. what is a rule that represents this function? a: y=x^3 b: y= 3^x c: y=3x d: y= x+3

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.