For personal research, I'm doing some analysis on collected data and trying to develop relationships between two variables where the data is collected through a data logger. I'm hypothesising that a = alpha \* b for any point in my data logger.


Anyways I plotted the 5,000+ x,y points below, and the only relationship I see is a cloud or airplane wing shaped one where it is linear at the bottom and and a curved line on the top. Doing log scales didn't help either. 


**EDIT** So I'm not allowed to submit image tags as a new user, but [here's the graph](http://koopics.com/ask_math_chart.jpg)


How can I improve my data analysis and is there a tool / cheat sheet that recommend a statistical analysis for a type of data. 


It'll be nice if you can help find a solution; however, my goal is to learn about statistical analysis tools, that'll help me better understand the data and solve the problem.



Statistical Data Analysis
To find the relationship between the data try this tool - to all of my knowledge this is the best one available (at least I am very excited about it)


<http://ccsl.mae.cornell.edu/eureqa>


