The table below gives the cost per person to rent a fishing charter boat. find the rate of change given that it is constant. also, explain what the rate of change means for this situation.

people | cost($)
2 | 110
3 | 165
4 | 220
5 | 275

a: 1/55
b: 110/1
c: 1/275
d: 55/1

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field