My guess is that no equation can be derived from the original equation for part b.

Problem:

FedEx Mailing cost. The cost C of shipping a FedEx priority overnight package weighing 1 Lb or more a distance 1001 to 1400 miles is given by C = 2.8 x + 21.05 where x is the number of pounds. (source; FedEx corporation)

a) Is the distance a factor in calculating the cost? If so , is it included in this equation. Discuss why or why not.

b) Using this equation, can you find another equation that calculates the cost for shipping a package 1401 to 2000 miles or an equation for 2001 to 2500 miles? if so please include your equations

c) Discuss the reasoning and methods of finding your equations.

Use the above FedEx cost equation to calculated the cost of shipping a 10 lb package 1250 miles.

Use your equation(s) to calculate the cost of shipping the same 10 lb package 1800 miles.

Use your equation(s) to calculated the cost of shipping the same 10 lb package 2400 miles.

Are your answers reasonable? Discuss the reasonableness of your answers, why or why not.