hey friend it is Observational study because it says that her records hourly temperature over the course of several years in order to make a decision(variations) or to analyse his experiments. ;)
The answer to your questions is B. {(4, 2), (4, –2), (9, 3), (9, –3)} because you don't have a repeat of a number the X side which is your output. I hope that this is the answer that you were looking for and it has helped you.
well ,what does your question means lol
Add all of the scores together which gives you
550+-1500+-2200+400+-600+-300
= -3650
Hope this helps! (:
The answer is 2x-8 and 1/7+7
