Answers and Explanation:
So I'm not sure about this at all since you probably already know:
For number 9, the rule would be that it "Multiplies by -3" or however you would write that (I haven't done this in a while.) This is because 7×-3=-21, -21×-3 is 63, and so on.
For number 10, the rule would be "It Multiplies by 3" for the same reason.
Sorry that this probably wasn't helpful because I don't know too much about the terms.
