How to perform backward chaining in logistic regression using R

@harry wrote:

I am currently solving one classification problem using logistic regression algorithm in R .I have created the model using step function, but my step function only performs forward chaining.I want to know is there a way by which I can perform backward chaining.

mod<-step(glm(Dependent~., family = binomial(link=logit),data = train_final))

Screenshot (100).png1366x768 19.1 KB

I also want to know what does AIC means in the model and how it values affect the model.

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