Hi all, 

 

I would like to create a scatter plot of two variables (y, x)  whith third value (z) written on the plot? After that i would like to add a line (Y=0.7*(x-20)) to the graph. 

 

I tried 

plot(x~y)

 

but there is no command for the third vairable to be shown on the graph

also i can't find a way to add a Y=x*(0.7-20) to the chart.

 

Thanks, m


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