A standard train ticket in a certain city costs $2.50 per ride. People who use the train also have the option of purchasing a frequent-rider pass for $18.00 each month. With the pass, a ticket costs only$1.75 per ride. How many train rides in a month make the frequent-rider pass a better deal than standard train tickets?
18/1.75 = 10.3
Eleven rides or more a month will save people money with the pass.