When working with regression analysis, residual plot is a handy tool to gain insights by visualization. The TI Nspire provided easy and convenient access to these plots in just a few clicks.
Using a simple linear regression as an example below:
Access the menu 4:Analyze > 7:Residuals will show the two options for residual plots, including Show Residual Squares and Residual Plots. The nice plotting output are show below.