Justin #2

A)
1:1
2:3
3:6
4:10
5:15
6:21
7:28
8:36
9:45
10:55

B.) I do see a pattern here, and i think it is the sum of n + n-1, or in simpler terms, add the answer from the last n value. n=1 1+0=1 n=2 2+1=3 n=3 3+3... n=6 is 15+6=21, which is same as 1+2+3+4+5+6

C.) I think there is a formula for this, but I can't really explain it when it comes to relatively large numbers in the series.

D.) I can't exactly PROVE it, but I can kinda show that it is a type of sequence that we might be learning this week ha.