Hi everybody,

I have realized a multiple linear regression. 
To know how well my model does in terms of prediction, I can compute prediction intervals bands and decide if they are narrow enough to be of use. If they are too wide, then they probably are not useful.

Using R, I have written these R codes.

LinearModel.1 <- lm(GDP.per.head ~ Competitivness.score + Quality.score, 
  data=Dataset)
summary(LinearModel.1)
predict(LinearModel.1, se.fit = FALSE, scale = NULL, df = Inf,interval = c("none", "confidence", "prediction"),level = 0.95, type = c("response", "terms"),terms = NULL)

Now, I am trying to draw one graph / plot, where I can have the straight regression line and the prediction interval bands in the same graph / plot to see if the bands are narrow enough to be of use.

Could you please help me with my R codes ?

Thanks for your precious help,

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