URGENT PLEASE HELP ASAP!!!

I forgot how to calculate the residual for a given value, from a set of data. I would appreciate if you could list the steps for solving this using a GRAPHING CALCULATOR (TI-84 Plus CE).

Thank you!

URGENT PLEASE HELP ASAP I forgot how to calculate the residual for a given value from a set of data I would appreciate if you could list the steps for solving t class=