[list=1][*]Click ONE check box at a time.[/*][*]Determine the slope and type it in the input box. Write your slope as a fraction when necessary. If the slope is undefined, write "undefined".[/*][*]Press enter on your keyboard. If on a phone/tablet, tap anywhere on the graph.[/*][*]The app will tell you if you are correct.[/*][*]Try all 5 lines![/*][/list]