PLEASE show me how to do the work as well like show me how to solve it.

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

According to the data set, where should the upper quartile line of the box plot be placed?

What are the values of each variable in the diagram below?