Question

The telephone company offers two billing plans for local calls. Plan one charges $28 per month for unlimited calls and plan to charges $14 per month $0.04 per call.

Answer 1

So I believe we're looking for the best long term plan

the first plan is staight forward so lets look at the secod one

14 + .04 times X

so if you make more than 350 calls (or more than 35o mins worth of calling time) you'll be charged more than the first plan due to 350 calls will equal 14 dollars with makes the bill 28 dollars which equals out the second and first plan