:)

3 and 4,
i don't understand how you 'describe the distribution of the data'

: )

What i get from distribution of data is the organization of the data on the plane. if the points are far apart, that's how they're distributed. if they're closer to each other, that's how they're distributed.
i hope this helped :)

These are the multiples of 15 but what you are probably asking or what are the factors of 15