Your family plans to take a vacation this summer. For the cost of the vacation to be manageable, you determine that it will be in the best interest of your family to share a vacation home with other families. The cost c (in dollars)
per family of the vacation home is inversely proportional to the number 1 of families sharing the house. Your family
wants the cost of the house per family to be $800. Currently, with three families (including your family), the
vacation home rental cost is $1200 per family. How many more families have to join to get the vacation home to be
manageable for your family?