Ok, I was bored and could justify working on this as part of statistics homework, getting better at using R. Here are my findings using the data thus far-
1) There appears to be no focus dependent effect on skill level damage slope. Using the data from Papi at focus level 245 and 315 I obtained these slope intercept equations and graphs-
Focus @ 245 Damage = 19.05(firebolt skill level) + 37.40
Focus @ 315 Damage = 20.39(firebolt skill level) + 39.32
These equations are not pin-point accurate since I rounded to hundredths, but they should be good enough.
What does this information tell us? At a set level of focus, and fire ability, there is a linear increase in dmg as you add a point to the skill. Unfortunately, this linear increase does not have a fixed slope at varying amounts of focus.
By looking at a scatterplot of the data provided by Papi’s mage of focus vs dmg we see this curvilinear relationship-
At this point I don’t know what the function of the data between focus and dmg is, the linear line I fit to the graph for reference is of the equation-
Damage = 0.6251(focus) + 350.0020
Further data I think would be useful is-
-All variables the same except varied character level
-All variables the same except varied ability level (fire ability in the case of firebolt)