The graph above shows the distance Mr. Johnson drives over time. What is the speed at which Mr. Johnson is driving?
A. 7 miles per hour
B. 40 miles per hour
C. 60 miles per hour
D. 80 miles per hour

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?