How to record your relationships!
This is not a discussion about your friendships but how the data can be described.
The best terminology to use for graphs that have
a trend which is a straight line is ‘a linear relationship’.
That avoids issues around whether something is directly proportional or proportional.
Directly proportional only applies when the graph is a straight line through the origin (or close to the origin within the uncertainty in the y-intercept). It is best to avoid ‘proportional’ altogether.
A curve, such as that produced when plotting irradiance against distance, can never be described as showing an ‘inversely proportional’ relationship, since it does not show the actual relationship (it could potentially be any number of different relationships).
Inverse proportionality can only be claimed when the correct graph of, for example, irradiance against 1/d2 is drawn, and it produces a straight line through the origin.
The type of graph produced for an internal resistance experiment is covered by the term ‘linear relationship’, as it follows the equation y=mx+c format.
Setting up a Word Document
In this section I’ll add information about how to write up your AH Project. Here is the first installment. Nothing great, but just to set up your document so that you gain the Structure mark
https://www.youtube.com/embed/aEXKJ66v5ck?si=E-YuybM5bz28aTgQ
Producing Graphs for your project
Being edited!
Adding Your Graphs into your project
Referencing
If you’ve time this is a great little document from Queen’s University Belfast,
Filetoupload,1560644,en.pdf (qub.ac.uk)
Feb 2025