1. Press the green flag to start at the top of the outer rim 2. Enter a input number between -100 and 100, in the rectangle at the bottom of the screen, then click the checkmark which is also in the same rectangle 3. Press the Save Data button which is located at the bottom left corner 4. If you know the rule, click Guess Rule at the bottom right corner, then press Enter on the keyboard 5. If you don't know the rule, click Ask Again at the bottom and then do steps 2 & 3 again
When entering the rule, either use x, +, - or / Please do not use letters or words except for x Example: x -5 or - 9