Dear Fuseini Jibreel ,

You need to fit the given data in a polynomial, y = P(x).

According to the given data, it seems that

in the long run, the packets delivery ratio:

"successfully delivered packets/ number of sent packets " goes to a constant polynomial which is p(x) = 0.7.

For more precision, you can make it as Bell's curve about the mean, y = 0.7. The construction is not complicated.

Best regards