I am supposed to be running a multiple linear regressions to test my hypotheses. However, when first testing the assumptions that should be met before performing a linear regression, it turns out my data is extremely random. Linear relationships, or any relationship, cannot be assumed, as can be seen in the scatterplots of these relationships (in the attachment both on individual level and country level). Anyone know how I can make this data linear? Or is there no way to fix this problem and perform a multiple linear regression?