Earlier, we saw that, on a country level, health affects happiness. Could this relationship be curvilinear? Using WVS data, run a simple regression with HEALTH as the independent variable and HAPPY as...

Earlier, we saw that, on a country level, health affects happiness. Could this relationship be curvilinear? Using WVS data, run a simple regression with HEALTH as the independent variable and HAPPY as the dependent variable. Then add the HEALTHSQRD variable to the model to see if it has an effect.