What is an equation of the line that passes through the points (2,-2) and (4,1) give me a real answer or reported.

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Which one ? is the answer and how to find this answer

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?