# Math Review of Week Two

Published on: Fri Feb 05 2010

**Exponential Functions**

**Inverse Functions **
**Horizontal Line Test**A function is one-to-one if and only if no horizontal line intersections it graph more than once.
Domain = independent variable = possible values of x in f(x)
Range = Dependent variable = possible solutions to f(x)
**Logarithms**

**Natural Logarithm**

**Inverse sine function**

**Tangent and Velocity**
The **Slope** of the tangent line is the **limit** of the slopes of the secant lines
This is extra stuff:
**Calculating Limits**

A. The limit of f(x) as *x* approaches *a*, equals **L**
B. f(x) approaches L as *x* approaches *a*.
**Derivatives and Rates of Change**