3) Fit lines to the scatterplots. (Try fitting lines to the all of the data, and separate lines to the three species.) Which is more appropriate? Hint: Double left hand mouse button click on the scatterplot matrix to make the Chart Editor window appear. To fit a straight line to all of the data select Add Fit Line at Total (choose Linear). If a line does not appear you will have to click on the Lines tab and select black as the Line Color. To fit a straight line to each species STAT3102/6102: Graphics, Multivariate Methods and Data Mining Week 5 SGTA separately select Add Fit Line at Subgroups (choose Linear). The line types should be different for the three species. 4) What can you tell about the relationship between sepal and petal length and width, and the influence of species on these? Are the relationships the same for all species? Are there any outliers