Blog 2

Part a
2) A function is a relationship in which for each input there is only one output.
3)http://www.faluninfo.net/article/1059/Why-Havent-I-Heard-About-This-Media-and-New-Religious-Movements-the-Case-of-Falun-Gong/http://www.nature.com/pr/journal/v72/n3/full/pr201273a.html

4) This graph shows the how people lose interest on a story as time passes, from the years 1999 to 2005. For each year, the interest people had in a given story decreased a certain amount.
5) The function is not linear.
6) The function is not linear because the interest people put on the story does not decrease constantly throughout time, menacing that it does not have a constant slope or average rate of change. When processing the following equation: y2-y1/x2-x1, one can realize that the answer is not the same for each coordinate I input, ask it should be if it was a linear function.
7) The function is not a mathematical model, because although there is only one input for every output, the interest people have in a story does not directly depend upon  time, although time does influence it and as time passes interest will decrease too.
Interest in story=f(time).

Part B
2) There is more than one output for each input, and the equation does not pass a vertical line test.
3) http://www.nature.com/pr/journal/v72/n3/full/pr201273a.html

4) This graph represents the relationship between insulin resistance and and insulin sensitivity, to test wether or not it had an effect on sleeping fragmentation and if this lead to affect the metabolism of obsess male Latinos. 

5) This is not a function because for every input there is more than one output, making this graph impossible to pass the vertical line test. For example for the x coordinate 0.4, there are two variables on that point.