NEED ANSWER ASAP PLEASE 4. Which statement below is true about linear functions?
(1) Linear functions grow by equal factors over equal intervals
(2) Linear functions grow by equal differences over equal intervals
(3) Linear functions grown by equal differences over unequal intervals
(4) Linear functions grow by unequal factors over equal intervals

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.