What is the equation of the line in slope-intercept form?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Which representation has a constant of variation of -2.5

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?