Blog Post #2

Part A:
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOMyzNvh0JGFLNupqBX94hCzxJGE4SS5FcVCisv-lOn2L5GpWW8kHw0Q1Krfa0Wg1vblZV_c4zxT5xuWdapBL1XsJqrsP7BN5NNeaTwwlPp8DivU4eUd3Ob3i_jsvk7iduUBYIYnF_rG_V/s1600/its-getting-better-infant-mortality-rates.jpg

1. As the years go on, the infant mortality rates decrease.
2. The relationship is indeed a linear function.
3. It passes the vertical line test and for each year there is a value on the graph (for each input there is one output).
4. The function here, D=f(Y), is a mathematical model because the trend of the infant mortality rates decreasing steadily as the years progress are in direct relationship with each other (due to advancements in technology and such).

Part B:
http://wattsupwiththat.files.wordpress.com/2013/01/surfacetemps_japan3.png

1. This graph demonstrates the relationship between temperature anomalies over the years.
2. This relationship is not a function because there are not inputs matched for every output value and this graph does not pass the vertical line test.