Question

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.

Which recursive equation represents the pattern?

Answer 1

hint: 1 = 1^2
4 = 2^2
9 = 3^2

do you see the pattern?

Answer 2

i dont understand the part on Which recursive equation represents the pattern?

Answer 3

please help