Question

Fan & Medal.
A playground is being designed where children can interact with their friends in certain combinations. If there is 1 child, there can be 0 interactions. If there are 2 children, there can be only 1 interaction. If there are 3 children , there can be 4 interactions. If there are 4 children, there can be 9 interactions.

How many interactions will there be for 8 children

Answer 1

A. 49
B. 64
C. 36
D. 40

Answer 2

Here this is how you can figure it out

Answer 3

Draw 8 little lines and draw lines from person 1 to person 2-8 and draw a line from person 2 to person 3-8 and so on

Answer 4

What? Is there an equation I should use?

Answer 5

No

Answer 6

Idk what you meant by drawing lines.

Answer 7

i'll show you

Answer 8

Yea

Answer 9

okay draw that and draw a line from line 1 to line 2,3 ,4,5,6,7,8 and so forth

Answer 10

?