The cost (£C) to each passenger on a coach trip varies inversely as the number (N) going on the trip. If 36 people go, the cost to each is £6.50, how do you find a formula connecting C and N?
Inverse variations are of the form
In this case
In practical terms this means: the coach trip costs GBP 234, and we split it by the number of people. Usually these problems are a bit more complex.