Why it Matters: Linear Functions
Why Learn About Linear Functions?
Joan wants to travel but does not have a lot of extra spending cash. She read on several travel blogs that a good way to travel is to get a credit card with air miles and use it for all the things you normally budget for. This way, a big chunk of your airfare can be paid for with air miles.
She applied for and got a credit card with air miles. Joan has planned to use her air miles card for the following things each month:
- gas = $30
- car insurance = $40
- mobile phone bill = $65
- groceries = $150
- entertainment - restaurants, movies, and live music = $50