Linear Systems & Equations

Compound Interest and Exponential Modeling

How money grows — and how the formula behind it describes almost everything that grows or decays.

Graphs of Exponential Functions

How exponential graphs behave, where they cross the axes, and what happens at their ends.

Rational Exponents

Fractional powers are just roots in disguise.

Regression Models

When data curves, a line won't fit — here's what to use instead.