A company sells and manufactures video games. Survey a video game stores indicated that a price of $79 each, the demand would be 300 games, and at a price of $29 each, the demand would be 1300 games. If a linear relationship between price and demand exists which of the following models the price Dash demand relationship? ( let x represent the price and y represent the demand)

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?