Help please. easy fractions

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.