You are going on a vacation and you decide to rent a car rather than using your own. You want to rent the car for 3 days and after surfing the internet for specials, found the following which includes tax:

Big Money Car Rental: $30 per day, unlimited mileage.

Dippity Do Car Rental: $25 per day, $0.10 extra per mile after 200 miles per day.

Set up the systems to describe these two situations.

Let x = total miles in 3 days
y = total rental car fee you pay for 3 days

Hint: when x < 600, y = …
when x > 600, y = …

How should you make your decision to pick the rental company if you simply based on the price? :o

Big money =30
Dippity Do=25+.1(x-600)

It depends on how many miles you would drive per day, without that information, there is nothing to test the two companies on.