A cellular phone company offers several different service options. One option, for people who plan on using the phone only in emergencies, costs the user $4.50/month plus $0.59/min for each minute the...

A cellular phone company offers several different service options. One option, for people who plan on using the phone only in emergencies, costs the user $4.50/month plus $0.59/min for each minute the phone is used. Write a linear function for the monthly costy of the phone in terms of the number of minutesx
the phone is used.?

Use the function to find the cost of using the cellular phone for 18 min in 1 month.
$ ?