Don't be surprised if this question pops up as one of the top interview questions for data visualization in R in your next interview. Response: The above chart represents the “toothgrowth” data analysis between length vs dose, given type of supplement. The supplement type can be OJ – Orange Juice or VC – Vitamin C. Based on this the plot shows length vs dose comparison for each of the supplement types of categories. We can accomplish this using coplot() function in R. require(graphics) coplot(len ~ dose | supp, data = ToothGrowth, panel = panel.smooth, xlab = "ToothGrowth data analysis")