non-constant errors के लिए समायोजन

# Run this to see how the model looks
ggplot(hypdata_nonequalvar, aes(x = explanatory, y = response)) + 
  geom_point() + 
  geom_smooth(method = "lm", se = FALSE)

# Model response vs. explanatory 
model <- ___

# Extract observation-level information
modeled_observations <- ___

# See the result
modeled_observations

# Using modeled_observations, plot residuals vs. fitted values
___