4 (8 points). The Pool Fun Company did a market survey to decide the pricing of Fun Noodles, a newly developed product. It is estimated that at $3 each, 10,000 Fun Noodles will be sold per day during the summer. Raising the price to $5 will cause the sales to fall to 7000 Noodles per day. Find an equation describing the relationship between :12, the price per Fun Noodle and y, the number of Fun Noodles sold per da}r during summer, assuming that it is linear