What is the slope of the line on the graph?

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a coordinate grid that includes the line y equals six x minus one. points are plotted at begin ordered pair 1 comma 5 end ordered pair begin ordered pair 0 comma negative 1end ordered pair and begin ordered pair negative 1 comma negative 7 end ordered pair.

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?