I am new *waves*
I badly need help with some linear modelling questions.
Here is the question:
Jessica Communications is a phone company that charges for SMS messages. For 10 messages the cost is $8. For 40 messages the cost is $14. Tarren Telephones also charge for SMS messages. For 20 messages, they charge $8. For 60 messages they charge $24.
(a) Find a linear model for each of the phone companies.
(b) Sketch both models on the same axes.
Thank you to anyone who replies!
Also I am not good at maths so if you could help by explaining it in a simpler way.