Finding an equation given a table of values using different operations - Cool math

The video tutorial explores different mathematical operations, starting with addition and subtraction, and then moving to multiplication. The teacher discusses the limitations of using integers for multiplication and explores combining operations to find a rule that works for all given values. Through testing various rules, a consistent rule is finalized that applies to all values in the problem set.

What combinations did the teacher suggest for multiplying to get close to -9?

How did the teacher verify the rule for the multiplication of 7 and -3?