A savings account balance can be modeled by the graph of the linear function shown on the grid. What is the rate of change of balance with respect to the number of deposits?

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?