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webmathematica - Regression Line in Mathematica using FIT function

I dont know if I am confused or if I am doing this incorrectly. I have two data sets a={1,2,3,4,5} b={6,7,8,9,10}Mathematica will translate the sets as a = {1,1},{2,2},{3,3},{4,4},{5,5} b = {1,6},{2,7},{3,8},{4,9},{5,10}I want to do a scatter plot and find the regression line. I know how to do a scatter plot but I am not sure how to do a regression line for both data sets. I looked around and it was suggested to me that I can use this regline = Fit[Join{a,b},{1,x},x] Show[ListPlot[{a,b}], Plot[{regline}, {x, 0, 10}]]This works but the "Join...Read more