Chemistry IA Data analysis

Hi. For my Chemistry IA, I am observing the effect of ionic radius of alkali metal cations in chloride salt solutions on Conductivity , between .01M and .1M I currently have graphs for conductivity vs molarity. For comparing conductivity vs Ionic radius (bare and hydrated)(Li+,Na+,K+) should I do graphs at each concentration and/or slope of 'conductivity vs molarity' vs Ionic radius? as they are not parrellel.

Thanks

If there is any other insight that would be nice aswell.