A user is charged Php 300 monthly for a particular
mobile plan, which includes 100 free text messages.
Messages in excess of 100 are charged Php 1 each.
Represent the amount a consumer pays each month
as a function of the number of messages m sent in a
month.
t = amount a costumer pays
m = messages sent
1 answer
300 + (m-100) = m
1 answer