# Secant Lines and Tangent Lines

**Secant lines** are lines that are based off of two points on a function. Finding the slope of a secant line can be found using the slope equation.

**Tangent lines** are lines that are based off of one point on a function. Finding the slope of a tangent line can be found using the derivative equation or alternative derivative equation.

## Essential Questions

Essential Questions

### How is the slope of a tangent line calculated?

How is the slope of a tangent line calculated?