If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

Properly formatted charts and graphs can help you grasp the patterns and trends hidden within the raw data of an Excel spreadsheet. For example, if you are comparing the stock performance of two ...

Dr. JeFreda R. Brown is a financial consultant, Certified Financial Education Instructor, and researcher who has assisted thousands of clients over a more than two-decade career. She is the CEO of ...