geom_abline does not show a line

Hi all I have used following code to draw a plot. But Geom abline won't appear.


bmi %>% ggplot(aes(HT,WT)) + geom_point(alpha=0.5) + geom_abline(intercept=0,slope=r)

What I got isRplot

Please help

If you calculate the value of r*160, I think you will find that the value does not lie within the displayed y values.

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