Find the gradient of the line segment between the points (4,6) and (8,14).

Having a hard time understanding this question (see attachment).

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?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2