Hi there Amada,
Welcome to the Q&A Board.
The word "exposure bias" is used interchangeably with "exposure compensation." Many digital cameras have a setting where you can change the exposure bias value. We have lots of information, including some illustrations, about it here:
http://www.digicamhelp.com/what-is-exposure-compensation/exposure-compensation.htmSome digital cameras also offer automatic exposure bracketing:
http://www.digicamhelp.com/what-is-exposure-compensation/auto-exposure-bracketing.htmIf you have further questions about this after reading the info, please don't hesitate to ask.