Anyone wondering how to find derivative on a Casio fx-7400GII. These are the steps I figured out: 1. Go to your graph in the menu 2. Enter the equation 3. Press f6 or enter button (EXE) 4. Press Shift + Gsolv 5. Press f6 to find y-calc 6. Press f1 to select y-calc 7. Enter the x-value 8. Press EXE 9. y= the derivative I hope this helps anyone confused like I was.