This guide illustrates how to use an input/output table when given any type of function. In addition, this guide uses formulas and concepts to create models representing a given set of data.

There are four components of an exponential model:

**Independent/Input:**Any number you plug into a function. These numbers can be used as x-coordinates.**Dependent/Output:**We can plug any number into a function. After we calculate the function, our answer is our output. These can be used as y-coordinates when graphing.**Rate of Change (a):**The rate of change is different from a linear model because it is NOT a constant change between coordinates. Using the formula in the model provided on the left, you can calculate the value.**Y-Intercept:**Input is ALWAYS 0. Depending on the scenario, this is most likely the starting point.

**Here are some quick notes:**

**Here is a video with examples:**