I'm working on my assignment and I'm a bit lost. So the assignment requires us to draw a scatter plot based on data that we collected online. The purpose of the assignment is to see if higher earnings are correlated with a higher percent of university graduates. We were instructed to plot the cause on the x-axis and the effect on the y-axis. I was planning on placing the percentage of the population that has a university degree on the y-axis and the earnings on the x-axis. However, looking at some scatter plots online they have it the other way around (isn't this a reverse cause). Are both methods correct or is mine wrong?
I also had a second question regarding this assignment. In a previous assignment I lost a lot of marks for making the scale of my scatter plot small. I'm unsure how the scale could have been small when the percentage that I was working with ranged from 0.6% to 1.4%. I was wondering, how should I go about making the scale for this scatter plot since my lowest data value is 0.2% and my highest data value is 0.4%?
Additional info: I used excel to make my scatter plot and the points did look squished together. I would love to do draw it by hand this time around so any help I can get on this is much appreciated.