Rabuet Travel offers helicopter service from suburban towns to John F$.$ Kennedy International Airport in New York City. Each of its eleven helicopters makes between $1,100$ and $2,200$ round$-$trips per

year. The records indicate that a helicopter that has made $1,100$ round$-$trips in the year incurs an average operating cost of $$500$ per round$-$trip, and one that has made $2,200$ round$-$trips in the year

incurs an average operating cost of $$400$ per round$-$trip.

Read the requirements.

Requirement $1.$ Using the high$-$low method, estimate the linear relationship $y=a+bx,$ where $y$ is the total annual operating cost of a helicopter and $x$ is the number of round$-$trips it makes to JFK

airport during the year.

Requirements

Using the high$-$low method, estimate the linear relationship $y=a+bx,$ where $y$

is the total annual operating cost of a helicopter and $x$ is the number

of round$-$trips it makes to JFK airport during the year.

Give examples of costs that would be included in a and in $b.$

If Rabuet Travel expects each helicopter to make, on average, $1,600$

round$-$trips in the coming year, what should be its estimated operating budget

for the helicopter fleet?