Extend
3, 6, 9, 12, 15
What is growing, going up, addition, getting bigger
88, 77, 66, 55, 44
What is going down, negative, subtraction, shrinking
3, 6, 12, 24, 48 (hint multiply)
What is multiply 2
72, 74, 76, 78, 80
What is growing, positive, getting bigger, addition
5, 15, 45, 135 (hint multiply)
What is multiply 3