After completing this module, you should be able to ...

- Identify the difference between "forward" and "reverse" types of calculations.
- Accurately make "forward" calculations with R.
- Accurately make "reverse" calculations with R.

## Preparation for Class

Use the resources below to answer these questions. [*Problems with videos?*]

**Primary Resources**(6 pages, 41 mins)- Reading
- Forward Calculations in R [6 mins]
- Reverse Calculations in R [6 mins]
- Fall 2020B In-Class “Review Lecture” [29 mins]
- Projection is this example

## Practice

## Archive

- Preparation Resources
- 68-95-99.7 Rule [8 mins]

- Exercises