This minimal setup assignment is a great lesson for your students to complete while you are out! Just have the pdf printout ready for your students, and have the substitute open the graphing program file on the classroom screen, and that's it! From there the lesson is self-explanatory, with easy-to-understand instructions for the sub and students to follow!
The zip file download includes a printable pdf file, an answer sheet pdf file, and an interactive graphing GeoGebra file.
The freeware