You need a lear jet for one day, knowing that Swissair rens a lear jet with a pilot for $2000 per day........

$2000 per day plus $1.75 per mile and that Air France rents a lear jet with a pilot for $1500 per day plus $2.00 a mile find the following
a. write a formula for cost as a function of distance traveled for each company
b. if cost were the only issue, when would you rent from Air France? Why or why not?

please help and how would i graph the functions in question a. ? thanks

a. Swissair: 2000 + 1.75d
Air France: 1500 + 2d

b. You would rent from Air France when it is cheaper; that is, when
1500 + 2d < 2000 + 1.75d
.25 d < 500
d < 2000

So you would rent from Air France when you needed to fly less than 2000 miles, and from Swissair when you needed to fly more than 2000. If a trip is exactly 2000 miles, then you are indifferent between the two companies; they both cost $5,500. (Found by plugging $2,000 into either function.)

The graphs will just be intersecting straight lines. Air France will have points at (0,1500) and (2000,5500) and Swissair will have points at (0,2000) and (2000,5500).