Linear Equations come up often in financial examples and below we have linked to a handful of problems of the week with financial contexts. Linear models are used to represent potential pricing schemes and really lend themselves to thinking about comparing models at different points in time or different price points.

**Example Math Tool: Constant Cost Per Minute
**

ChitChat, a cellular-phone-service provider, has no monthly fee for

cellular-phone service but does charge a $0.45 per minute usage fee.

Students can move the slider on the left to adjust the rate per minute and explore how that changes the graph on the right (total minutes. vs. cost). This is a great tool from NCTM that connects directly to the 6th 8th grade algebra standards.

If you have not already created a**free account**, you'll need to do so to access the Financial Education Problems of the Week.