Can anyone help me on question 1?

Given the following linear function sketch the graph of the function and find the domain and range. ƒ(x) = -5x + 4

Which strategy is used by public health to reduce the incidence of food poisoning?

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?