I think its 9 because 9 times 2 is 18 9 times 6 is 54 and 9 times 8 is 72
It is something that is not consistent. Having a fixed pattern or liable to be changed.
The first question is 50% because a total of 30 girls bought lunches out of 60 kids
the second question, the easiest way is to plug in the x and y coordinates
3(4) - 2(0) = 12
12-0=12
12=12
because 12 = 12 is true, the first pair is the answer