inverse variation

The number of pechay plants n in a row varies inversely as the space s between them.

The cost c per person of renting a private resort varies inversely as the number n of persons sharing the rent.

Find the constant of variation y varies inversely as x and y = 18 when x = 3.

Find the constant of variation If r varies inversely as s and r = 100 when s = 27

If y varies inversely as x and y = 10 when x = 2, find y when x = 10.

At 60 kilometers per hour it takes Loida 10 hours to travel from her house to their house in

the province. How long will it take her if she travels at 80 kilometers an hour?