I have grown a bit tired of the “standard” old word problems. There is so much data in the world today that the applications just jump out of the Internet. Thought I might share some of these, with the relevant topics, as I write them. These are shared freely and I ask only that you cite the source with CC BY 4.0 licensing.

Percents

Slope and Rate of Change

- Slope: Comparisons in Life Expectancy at Birth
- Rate of Change: Snapchat Clones
- Rate of Change: Snapchat Growth in Perspective
- Average Rate of Change: Cell Phone Only Households

Identifying Linearity

- Identifying Linearity: Tesla Deliveries
- Identifying Linearity: Uber Fares
- Identifying Linearity: Record Your Own Uber Fare Data

Equations of a Line

- Equation of a Line: Netflix and Cable
- Equation of a Line: Landlines vs Cell Phones
- Linear Functions: Cell Phones and International Roaming
- Linear Regression: Uber vs Lyft
- Linear Regression: Smart Appliances
- Linear Models: Population of Iceland
- Linear Regression: Amazon Prime Memberships

Function Notation

- Function Notation from a table: Smart Home Market Research
- Function Notation from a graph: Software Security Risks

Piecewise Functions

- Piecewise Functions: Spotify
- Piecewise Functions: FogBugz Pricing Cliff
- Piecewise Functions: Silvercar Pricing

Exponential Functions