So I cannot edit the PDF. But if you go to Desmos Graphing Calculator you can do part 2 easily.
Part 3: The answer to number 8 is 17.922. Number 11: 0.860. Number 13: Your data has a greater rate of change (1.3653250774) This is because their data is an average of the human population. The people you took data from do not necessarily have an "average" length. Number 16: Your data can not represent an exact function, this is because the data does not all lay on one single line, but it can be represented by an estimated function. Their data is a function. This is because using their data you can find an exact line of data.
